Who Called Me from Area Code 443?
Quick answerA 443 call usually comes from Baltimore or nearby communities, but caller ID can be spoofed, so a local-looking number isn’t proof. If there’s no voicemail, let it go: legitimate callers leave messages.
- No voicemail? Let it go. Real callers leave messages.
- Recognize the pattern? Check the number in the prefix lookup.
- Getting repeats? ActiveArmor® blocks and labels them automatically.
- Same prefix calling again? Compare it against this month’s most-reported 443 prefixes, right on this page.
- Curious who issued a number? Every 443 prefix belongs to a carrier — the registry names it.
Been targeted?Report the call at reportfraud.ftc.gov — reports feed the complaint data that powers spam blocking, including the board on this page. AT&T customers already have ActiveArmor® screening built in.
Most-reported 443 prefixes this month
PrefixReported patternReport volume
(443) 227-XXXXRobocall-heavy
(443) 755-XXXXRobocall-heavy
(443) 412-XXXXRobocall-heavy
(443) 464-XXXXRobocall-heavy
(443) 452-XXXXRobocall-heavy
322 unwanted-call reports naming 443 numbers in FTC Do Not Call complaint data, July 2–17, 2026. Consumer-reported and unverified.
Block spam calls in the 443, included with AT&T wireless
AT&T ActiveArmor® is the network-level security that screens the calls this page is about:
- Fraud calls blocked automatically on the network
- Suspected spam labeled before you answer
- Caller ID & custom call blocking in the free app
- Reverse number lookup (available with ActiveArmor Advanced security. Fee required.)
- Identity monitoring & identity theft insurance (available with ActiveArmor Advanced security. Fee required.)
Included with AT&T wireless plans. Requires compatible device/service and download of the AT&T ActiveArmor® app. Other terms & restrictions apply. May not detect all threats and may block wanted calls. Some features require Advanced mobile security ($7/mo.). See terms.
See how ActiveArmor worksIncluded with the free 30-day AT&T Wireless℠ trialTry AT&T Wireless℠ free for 30 daysDownload the AT&T app, activate a trial eSIM in minutes, and run our network side by side with your current service. No credit card, keep your number.
- 100GB of data plus 25GB hotspot
- Unlimited talk & text in the U.S., Canada and Mexico
- Texting from the U.S. to 200+ countries & territories
- Access to the AT&T 5G network
Offer details
Service good for 30 days. Data: Limited to 100GB of data and 25GB of hotspot data. No additional data is available after limit is reached. Video is limited to SD quality. Talk & Text: Includes unlimited talk & text within the U.S. and unlimited text from the U.S. to over 230 countries. Limits: One trial per user. An unlocked, dual eSIM iPhone is required. You’ll receive a trial phone number that belongs to AT&T and is not available to be ported to another carrier or otherwise retained. Trial plan features and details may differ from or be unavailable in other AT&T plans. U.S. only. All terms subject to change at any time.
Is Area Code 443 a Scam?
No. 443 is a legitimate Baltimore area code.
It’s added to the 410 region in 1997 and serves Baltimore and surrounding communities. But legitimacy of the code says nothing about any single call. Scammers spoof local numbers constantly.
The code is realAdded to the 410 region in 1997; 785 assigned carrier prefixes serve it today.
Spoofing happens“Neighbor spoofing” fakes local numbers. No voicemail? Let it go.
Screening includedActiveArmor® labels and blocks suspected spam. Included with AT&T wireless plans.
Been targeted? Report it to the FTC at reportfraud.ftc.gov. Reports feed the complaint data that powers spam blocking.
Scam texts from area code 443 numbers
The most common area code 443 text scam is the “wrong number” opener: a friendly message that pretends to know you, then moves the chat to WhatsApp and eventually to an investment pitch. Scripts currently circulating:
- “U at home?” · “Are you busy tomorrow?” · “How are you doing?”
- Delivery-problem and job-offer texts that link out to a login page
Don’t reply. A response marks your number as live. Forward scam texts to 7726 (SPAM), and AT&T ActiveArmor® filters known senders automatically.
How number spoofing works in area code 443
Caller ID is easy to forge. Spoofing fakes the number a call displays. The real owner of that 443 number isn’t involved and usually has no idea. That’s why blocking one number rarely stops the calls.
- A call from a number almost identical to yours (same 443 and prefix) is “mirror spoofing.” A missed call from your own number is never worth returning.
- Strangers calling you back saying you called them? Your 443 number is being spoofed. It typically passes within days, and you don’t need a new number. Report it at reportfraud.ftc.gov.
- The caller-ID checkmark: AT&T verifies network calls (STIR/SHAKEN). A verified mark means the displayed number wasn’t faked. No mark doesn’t always mean scam, but treat it with more caution.
Spoofed or not, the rule holds: unexpected caller, no voicemail? Let it go.
443 Area Code Prefix & Carrier Lookup
The three digits after the area code identify the carrier a number was issued to. All 785 assigned 443 prefixes below are real, from the public numbering registry. Type to filter.
This isn’t a reverse phone lookup: no legitimate free service can tell you who owns a specific number. What a 443 prefix does show: the carrier that issued it, whether it’s wireless, landline or VoIP, and the community it belongs to, which is often enough to judge whether a call was worth returning.
785 prefixes · updated monthly
| Prefix | Carrier | Line type |
|---|---|---|
| 443-200 | Verizon Business (MCImetro) | Landline |
| 443-201 | AT&T Mobility | Wireless |
| 443-202 | Verizon Wireless | Wireless |
| 443-203 | Verizon Maryland | Landline |
| 443-204 | AT&T Mobility | Wireless |
| 443-205 | Verizon Wireless | Wireless |
| 443-206 | Verizon Wireless | Wireless |
| 443-207 | T-Mobile (Omnipoint) | Landline |
| 443-208 | T-Mobile (Omnipoint) | Landline |
| 443-209 | Windstream (Paetec) | Landline |
| 443-210 | T-Mobile (Omnipoint) | Landline |
| 443-212 | Windstream (Paetec) | Landline |
| 443-213 | Verizon Maryland | Landline |
| 443-214 | AT&T Mobility | Wireless |
| 443-215 | Core Communications | Landline |
| 443-216 | Windstream (Paetec) | Landline |
| 443-217 | Core Communications | Landline |
| 443-218 | Lumen (Level 3) | VoIP |
| 443-219 | Lumen (Level 3) | VoIP |
| 443-220 | Verizon Maryland | Landline |
| 443-221 | Lumen (Level 3) | VoIP |
| 443-222 | Onvoy (Sinch) | VoIP |
| 443-223 | Verizon Wireless | Wireless |
| 443-224 | Verizon Business (MCImetro) | Landline |
| 443-225 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-226 | T-Mobile (Omnipoint) | Landline |
| 443-227 | Windstream (Paetec) | Landline |
| 443-228 | Windstream (Paetec) | Landline |
| 443-229 | Windstream (Paetec) | Landline |
| 443-230 | Windstream (Paetec) | Landline |
| 443-231 | AT&T (Teleport Communications) | Landline |
| 443-232 | Core Communications | Landline |
| 443-233 | Windstream (Paetec) | Landline |
| 443-234 | Windstream (Paetec) | Landline |
| 443-235 | Verizon Wireless | Wireless |
| 443-236 | Core Communications | Landline |
| 443-237 | Core Communications | Landline |
| 443-238 | Windstream (Paetec) | Landline |
| 443-239 | AT&T Mobility | Wireless |
| 443-240 | AT&T Mobility | Wireless |
| 443-241 | Onvoy (Sinch) | VoIP |
| 443-242 | Windstream (Paetec) | Landline |
| 443-243 | Verizon Wireless | Wireless |
| 443-244 | Lumen (Level 3) | VoIP |
| 443-245 | Windstream (Paetec) | Landline |
| 443-246 | Core Communications | Landline |
| 443-247 | Windstream (Paetec) | Landline |
| 443-248 | Verizon Wireless | Wireless |
| 443-249 | Verizon Maryland | Landline |
| 443-250 | T-Mobile (Omnipoint) | Landline |
| 443-251 | Onvoy (Sinch) | VoIP |
| 443-252 | Verizon Wireless | Wireless |
| 443-253 | AT&T Mobility | Wireless |
| 443-254 | T-Mobile (Omnipoint) | Landline |
| 443-255 | AT&T Mobility | Wireless |
| 443-256 | Windstream (Paetec) | Landline |
| 443-257 | Verizon Wireless | Wireless |
| 443-258 | AT&T Mobility | Wireless |
| 443-259 | Verizon Maryland | Landline |
| 443-260 | Verizon Maryland | Landline |
| 443-261 | Verizon Business (MCImetro) | Landline |
| 443-262 | Verizon Maryland | Landline |
| 443-263 | Verizon Maryland | Landline |
| 443-264 | Core Communications | Landline |
| 443-265 | Windstream (Paetec) | Landline |
| 443-266 | Bandwidth.com | VoIP |
| 443-267 | AT&T (Teleport Communications) | Landline |
| 443-268 | Core Communications | Landline |
| 443-269 | Core Communications | Landline |
| 443-270 | Windstream (Paetec) | Landline |
| 443-271 | T-Mobile (Omnipoint) | Landline |
| 443-272 | AT&T (Teleport Communications) | Landline |
| 443-273 | AT&T (Teleport Communications) | Landline |
| 443-274 | Verizon Maryland | Landline |
| 443-275 | Comcast (Xfinity Voice) | VoIP |
| 443-276 | Verizon Business (MCImetro) | Landline |
| 443-277 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-278 | Vdl, Inc. dba Global Telecom Brokers | Landline |
| 443-279 | Verizon Business (MCImetro) | Landline |
| 443-280 | AT&T Mobility | Wireless |
| 443-281 | Verizon Business (MCImetro) | Landline |
| 443-282 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-283 | Windstream (Paetec) | Landline |
| 443-284 | Core Communications | Landline |
| 443-285 | Verizon Maryland | Landline |
| 443-286 | Verizon Wireless | Wireless |
| 443-287 | Verizon Maryland | Landline |
| 443-288 | Verizon Business (MCImetro) | Landline |
| 443-289 | Verizon Business (MCImetro) | Landline |
| 443-290 | Lumen (Level 3) | VoIP |
| 443-291 | Lumen (Level 3) | VoIP |
| 443-292 | Lumen (Level 3) | VoIP |
| 443-293 | Verizon Wireless | Wireless |
| 443-294 | Bandwidth.com | VoIP |
| 443-295 | Lumen (Level 3) | VoIP |
| 443-296 | Lumen (Level 3) | VoIP |
| 443-297 | AT&T (Teleport Communications) | Landline |
| 443-298 | AT&T Mobility | Wireless |
| 443-299 | Verizon Wireless | Wireless |
| 443-300 | Lumen (Level 3) | VoIP |
| 443-301 | AT&T Mobility | Wireless |
| 443-302 | Lumen (Level 3) | VoIP |
| 443-303 | Lumen (Level 3) | VoIP |
| 443-304 | Bandwidth.com | VoIP |
| 443-305 | Lumen (Level 3) | VoIP |
| 443-306 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-307 | Lumen (Level 3) | VoIP |
| 443-308 | Verizon Business (MCImetro) | Landline |
| 443-309 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-310 | AT&T Mobility | Wireless |
| 443-312 | Lumen (Level 3) | VoIP |
| 443-313 | Lumen (Level 3) | VoIP |
| 443-314 | T-Mobile (Omnipoint) | Landline |
| 443-315 | AT&T Mobility | Wireless |
| 443-316 | Lumen (Level 3) | VoIP |
| 443-317 | Bandwidth.com | VoIP |
| 443-318 | Windstream (Paetec) | Landline |
| 443-319 | Windstream (Paetec) | Landline |
| 443-320 | Lumen (Level 3) | VoIP |
| 443-321 | Windstream (Paetec) | Landline |
| 443-322 | Windstream (Paetec) | Landline |
| 443-323 | Windstream (Paetec) | Landline |
| 443-324 | T-Mobile (Omnipoint) | Landline |
| 443-325 | Windstream (Paetec) | Landline |
| 443-326 | AT&T Mobility | Wireless |
| 443-327 | Windstream (Paetec) | Landline |
| 443-328 | Windstream (Paetec) | Landline |
| 443-329 | Lumen (Level 3) | VoIP |
| 443-330 | Windstream (Paetec) | Landline |
| 443-331 | Windstream (Paetec) | Landline |
| 443-332 | Windstream (Paetec) | Landline |
| 443-333 | AT&T Mobility | Wireless |
| 443-334 | Verizon Business (MCImetro) | Landline |
| 443-335 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-336 | T-Mobile (Omnipoint) | Landline |
| 443-337 | Core Communications | Landline |
| 443-338 | Windstream (Paetec) | Landline |
| 443-339 | Windstream (Paetec) | Landline |
| 443-340 | Verizon Wireless | Wireless |
| 443-341 | Lumen (Level 3) | VoIP |
| 443-342 | Windstream (Paetec) | Landline |
| 443-343 | AT&T (Teleport Communications) | Landline |
| 443-344 | Core Communications | Landline |
| 443-345 | Lumen (Level 3) | VoIP |
| 443-346 | Core Communications | Landline |
| 443-347 | Windstream (Paetec) | Landline |
| 443-348 | AT&T (Teleport Communications) | Landline |
| 443-349 | Core Communications | Landline |
| 443-350 | Verizon Wireless | Wireless |
| 443-351 | Windstream (Paetec) | Landline |
| 443-352 | Lumen (Level 3) | VoIP |
| 443-353 | Verizon Maryland | Landline |
| 443-354 | Lumen (Level 3) | VoIP |
| 443-355 | Lumen (Level 3) | VoIP |
| 443-356 | Lumen (Level 3) | VoIP |
| 443-357 | Verizon Maryland | Landline |
| 443-358 | Ymax Communications | Landline |
| 443-359 | Verizon Wireless | Wireless |
| 443-360 | AT&T (Teleport Communications) | Landline |
| 443-361 | Core Communications | Landline |
| 443-362 | T-Mobile (Omnipoint) | Landline |
| 443-363 | Core Communications | Landline |
| 443-364 | AT&T (Teleport Communications) | Landline |
| 443-365 | T-Mobile (Omnipoint) | Landline |
| 443-366 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-367 | Verizon Maryland | Landline |
| 443-368 | Core Communications | Landline |
| 443-369 | Core Communications | Landline |
| 443-370 | AT&T Mobility | Wireless |
| 443-371 | Lumen (Level 3) | VoIP |
| 443-372 | Windstream (Paetec) | Landline |
| 443-373 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-374 | Windstream (Paetec) | Landline |
| 443-375 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-376 | AT&T (Teleport Communications) | Landline |
| 443-377 | Verizon Wireless | Wireless |
| 443-378 | T-Mobile (Omnipoint) | Landline |
| 443-379 | Comcast (Xfinity Voice) | VoIP |
| 443-380 | Lumen (Level 3) | VoIP |
| 443-381 | AT&T Mobility | Wireless |
| 443-382 | Core Communications | Landline |
| 443-383 | Windstream (Paetec) | Landline |
| 443-384 | Windstream (Paetec) | Landline |
| 443-385 | Core Communications | Landline |
| 443-386 | Verizon Wireless | Wireless |
| 443-387 | Core Communications | Landline |
| 443-388 | Verizon Wireless | Wireless |
| 443-389 | Core Communications | Landline |
| 443-390 | Bandwidth.com | VoIP |
| 443-391 | Lumen (Level 3) | VoIP |
| 443-392 | AT&T (Teleport Communications) | Landline |
| 443-393 | Lumen (Level 3) | VoIP |
| 443-394 | Verizon Maryland | Landline |
| 443-395 | Verizon Maryland | Landline |
| 443-396 | Lumen (Level 3) | VoIP |
| 443-397 | Verizon Wireless | Wireless |
| 443-398 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-399 | Onvoy (Sinch) | VoIP |
| 443-400 | Verizon Business (MCImetro) | Landline |
| 443-401 | Verizon Wireless | Wireless |
| 443-402 | AT&T (Teleport Communications) | Landline |
| 443-403 | Lumen (Level 3) | VoIP |
| 443-404 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-405 | Comcast (Xfinity Voice) | VoIP |
| 443-406 | AT&T (Teleport Communications) | Landline |
| 443-407 | Verizon Business (MCImetro) | Landline |
| 443-408 | Verizon Business (MCImetro) | Landline |
| 443-409 | Windstream (Paetec) | Landline |
| 443-410 | Lumen (CenturyLink) | Landline |
| 443-412 | AT&T (Teleport Communications) | Landline |
| 443-413 | T-Mobile (Omnipoint) | Landline |
| 443-414 | T-Mobile (Omnipoint) | Landline |
| 443-415 | T-Mobile (Omnipoint) | Landline |
| 443-416 | T-Mobile (Omnipoint) | Landline |
| 443-417 | AT&T (Teleport Communications) | Landline |
| 443-418 | T-Mobile (Omnipoint) | Landline |
| 443-419 | Windstream (Paetec) | Landline |
| 443-420 | Bandwidth.com | VoIP |
| 443-421 | AT&T Mobility | Wireless |
| 443-422 | AT&T Mobility | Wireless |
| 443-423 | Lumen (Level 3) | VoIP |
| 443-424 | AT&T (Teleport Communications) | Landline |
| 443-425 | AT&T (Teleport Communications) | Landline |
| 443-426 | Windstream (Paetec) | Landline |
| 443-427 | Core Communications | Landline |
| 443-428 | Core Communications | Landline |
| 443-429 | Windstream (Paetec) | Landline |
| 443-430 | Verizon Business (MCImetro) | Landline |
| 443-431 | Core Communications | Landline |
| 443-432 | Windstream (Paetec) | Landline |
| 443-433 | Verizon Business (MCImetro) | Landline |
| 443-434 | Telnyx | Landline |
| 443-435 | T-Mobile (Omnipoint) | Landline |
| 443-436 | Verizon Maryland | Landline |
| 443-437 | AT&T (Teleport Communications) | Landline |
| 443-438 | Verizon Wireless | Wireless |
| 443-439 | Verizon Wireless | Wireless |
| 443-440 | Verizon Business (MCImetro) | Landline |
| 443-441 | AT&T (Teleport Communications) | Landline |
| 443-442 | Windstream (Paetec) | Landline |
| 443-443 | Commio | Landline |
| 443-444 | Verizon Maryland | Landline |
| 443-445 | Verizon Maryland | Landline |
| 443-446 | Verizon Business (MCImetro) | Landline |
| 443-447 | AT&T Mobility | Wireless |
| 443-448 | Comcast (Xfinity Voice) | VoIP |
| 443-449 | Windstream (Paetec) | Landline |
| 443-450 | Lumen (Level 3) | VoIP |
| 443-451 | Windstream (Paetec) | Landline |
| 443-452 | Windstream (Paetec) | Landline |
| 443-453 | Onvoy (Sinch) | VoIP |
| 443-454 | T-Mobile (Omnipoint) | Landline |
| 443-455 | Verizon Maryland | Landline |
| 443-456 | Comcast (Xfinity Voice) | VoIP |
| 443-457 | AT&T (Teleport Communications) | Landline |
| 443-458 | Verizon Business (MCImetro) | Landline |
| 443-459 | Windstream (Paetec) | Landline |
| 443-460 | Verizon Business (MCImetro) | Landline |
| 443-461 | Windstream (Paetec) | Landline |
| 443-462 | Verizon Wireless | Wireless |
| 443-463 | T-Mobile (Omnipoint) | Landline |
| 443-464 | Windstream (Paetec) | Landline |
| 443-465 | Verizon Wireless | Wireless |
| 443-466 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-467 | AT&T Mobility | Wireless |
| 443-468 | T-Mobile (Omnipoint) | Landline |
| 443-469 | AT&T Mobility | Wireless |
| 443-470 | Windstream (Paetec) | Landline |
| 443-471 | Windstream (Paetec) | Landline |
| 443-472 | Lumen (Level 3) | VoIP |
| 443-473 | T-Mobile (Omnipoint) | Landline |
| 443-474 | AT&T Mobility | Wireless |
| 443-475 | Verizon Business (MCImetro) | Landline |
| 443-476 | Verizon Maryland | Landline |
| 443-477 | Verizon Wireless | Wireless |
| 443-478 | Verizon Wireless | Wireless |
| 443-479 | Verizon Maryland | Landline |
| 443-480 | Verizon Wireless | Wireless |
| 443-481 | Windstream (Paetec) | Landline |
| 443-482 | Verizon Maryland | Landline |
| 443-483 | Lumen (Level 3) | VoIP |
| 443-484 | Lumen (Level 3) | VoIP |
| 443-485 | Lumen (Level 3) | VoIP |
| 443-486 | Lumen (Level 3) | VoIP |
| 443-487 | Lumen (Level 3) | VoIP |
| 443-488 | AT&T Mobility | Wireless |
| 443-489 | AT&T (Teleport Communications) | Landline |
| 443-490 | Bandwidth.com | VoIP |
| 443-491 | Onvoy (Sinch) | VoIP |
| 443-492 | Lumen (Level 3) | VoIP |
| 443-493 | Verizon Wireless | Wireless |
| 443-494 | Bandwidth.com | VoIP |
| 443-495 | Bandwidth.com | VoIP |
| 443-496 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-497 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-498 | Verizon Business (MCImetro) | Landline |
| 443-499 | Bandwidth.com | VoIP |
| 443-500 | AT&T Mobility | Wireless |
| 443-501 | Lumen (Level 3) | VoIP |
| 443-502 | AT&T (Teleport Communications) | Landline |
| 443-503 | Verizon Business (MCImetro) | Landline |
| 443-504 | Windstream (Paetec) | Landline |
| 443-505 | Lumen (Level 3) | VoIP |
| 443-506 | T-Mobile (Omnipoint) | Landline |
| 443-507 | AT&T (Teleport Communications) | Landline |
| 443-508 | Windstream (Paetec) | Landline |
| 443-509 | Verizon Wireless | Wireless |
| 443-510 | Verizon Wireless | Wireless |
| 443-512 | Verizon Maryland | Landline |
| 443-513 | AT&T Mobility | Wireless |
| 443-514 | Windstream (Paetec) | Landline |
| 443-515 | Verizon Wireless | Wireless |
| 443-516 | Onvoy (Sinch) | VoIP |
| 443-517 | Lumen (Level 3) | VoIP |
| 443-518 | Verizon Maryland | Landline |
| 443-519 | Lumen (Level 3) | VoIP |
| 443-520 | AT&T Mobility | Wireless |
| 443-521 | Verizon Wireless | Wireless |
| 443-522 | Windstream (Paetec) | Landline |
| 443-523 | Verizon Maryland | Landline |
| 443-524 | Verizon Business (MCImetro) | Landline |
| 443-525 | AT&T Mobility | Wireless |
| 443-526 | Windstream (Paetec) | Landline |
| 443-527 | T-Mobile (Omnipoint) | Landline |
| 443-528 | T-Mobile (Omnipoint) | Landline |
| 443-529 | T-Mobile (Omnipoint) | Landline |
| 443-530 | Windstream (Paetec) | Landline |
| 443-531 | AT&T Mobility | Wireless |
| 443-532 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-533 | AT&T (Teleport Communications) | Landline |
| 443-534 | Verizon Wireless | Wireless |
| 443-535 | Verizon Maryland | Landline |
| 443-536 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-537 | Verizon Wireless | Wireless |
| 443-538 | T-Mobile (Omnipoint) | Landline |
| 443-539 | Windstream (Paetec) | Landline |
| 443-540 | AT&T Mobility | Wireless |
| 443-541 | Windstream (Paetec) | Landline |
| 443-542 | Comcast (Xfinity Voice) | VoIP |
| 443-543 | Verizon Maryland | Landline |
| 443-544 | Windstream (Paetec) | Landline |
| 443-545 | Lumen (Level 3) | VoIP |
| 443-546 | Verizon Maryland | Landline |
| 443-547 | Verizon Wireless | Wireless |
| 443-548 | Verizon Business (MCImetro) | Landline |
| 443-549 | Windstream (Paetec) | Landline |
| 443-550 | Lumen (Level 3) | VoIP |
| 443-551 | Lumen (Level 3) | VoIP |
| 443-552 | Verizon Maryland | Landline |
| 443-553 | Verizon Wireless | Wireless |
| 443-554 | T-Mobile (Omnipoint) | Landline |
| 443-556 | Verizon Maryland | Landline |
| 443-557 | Verizon Business (MCImetro) | Landline |
| 443-558 | Verizon Business (MCImetro) | Landline |
| 443-559 | Comcast (Xfinity Voice) | VoIP |
| 443-560 | T-Mobile (Omnipoint) | Landline |
| 443-561 | Windstream (Paetec) | Landline |
| 443-562 | AT&T Mobility | Wireless |
| 443-563 | T-Mobile (Omnipoint) | Landline |
| 443-564 | Lumen (Level 3) | VoIP |
| 443-565 | Windstream (Paetec) | Landline |
| 443-566 | Verizon Wireless | Wireless |
| 443-567 | Lumen (Level 3) | VoIP |
| 443-568 | Verizon Business (MCImetro) | Landline |
| 443-569 | Lumen (Level 3) | VoIP |
| 443-570 | T-Mobile (Omnipoint) | Landline |
| 443-571 | Verizon Wireless | Wireless |
| 443-572 | Verizon Maryland | Landline |
| 443-573 | Windstream (Paetec) | Landline |
| 443-574 | Windstream (Paetec) | Landline |
| 443-575 | Windstream (Paetec) | Landline |
| 443-576 | Verizon Business (MCImetro) | Landline |
| 443-577 | Windstream (Paetec) | Landline |
| 443-578 | Xo Maryland | Landline |
| 443-579 | Windstream (Paetec) | Landline |
| 443-580 | T-Mobile (Omnipoint) | Landline |
| 443-581 | Onvoy (Sinch) | VoIP |
| 443-582 | Windstream (Paetec) | Landline |
| 443-583 | Windstream (Paetec) | Landline |
| 443-584 | Windstream (Paetec) | Landline |
| 443-585 | Windstream (Paetec) | Landline |
| 443-586 | Core Communications | Landline |
| 443-587 | Windstream (Paetec) | Landline |
| 443-588 | Verizon Business (MCImetro) | Landline |
| 443-589 | Windstream (Paetec) | Landline |
| 443-590 | Lumen (Level 3) | VoIP |
| 443-591 | Verizon Wireless | Wireless |
| 443-592 | Core Communications | Landline |
| 443-593 | Windstream (Paetec) | Landline |
| 443-594 | Lumen (Level 3) | VoIP |
| 443-595 | Bandwidth.com | VoIP |
| 443-596 | Core Communications | Landline |
| 443-597 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-598 | Bandwidth.com | VoIP |
| 443-599 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-600 | T-Mobile (Omnipoint) | Landline |
| 443-601 | Windstream (Paetec) | Landline |
| 443-602 | Verizon Wireless | Wireless |
| 443-603 | Windstream (Paetec) | Landline |
| 443-604 | Verizon Wireless | Wireless |
| 443-605 | Windstream (Paetec) | Landline |
| 443-606 | Windstream (Paetec) | Landline |
| 443-607 | Windstream (Paetec) | Landline |
| 443-608 | AT&T Mobility | Wireless |
| 443-609 | Windstream (Paetec) | Landline |
| 443-610 | Verizon Wireless | Wireless |
| 443-612 | Verizon Maryland | Landline |
| 443-613 | AT&T Mobility | Wireless |
| 443-614 | Verizon Wireless | Wireless |
| 443-615 | Verizon Wireless | Wireless |
| 443-616 | Windstream (Paetec) | Landline |
| 443-617 | Verizon Wireless | Wireless |
| 443-618 | Verizon Wireless | Wireless |
| 443-619 | Verizon Wireless | Wireless |
| 443-620 | AT&T (Teleport Communications) | Landline |
| 443-621 | T-Mobile (Omnipoint) | Landline |
| 443-622 | T-Mobile (Omnipoint) | Landline |
| 443-623 | T-Mobile (Omnipoint) | Landline |
| 443-624 | Verizon Wireless | Wireless |
| 443-625 | Lumen (Level 3) | VoIP |
| 443-626 | Windstream (Paetec) | Landline |
| 443-627 | Lumen (Level 3) | VoIP |
| 443-628 | Core Communications | Landline |
| 443-629 | T-Mobile (Omnipoint) | Landline |
| 443-630 | Verizon Wireless | Wireless |
| 443-631 | AT&T Mobility | Wireless |
| 443-632 | Windstream (Paetec) | Landline |
| 443-633 | T-Mobile (Omnipoint) | Landline |
| 443-634 | Verizon Maryland | Landline |
| 443-635 | AT&T Mobility | Wireless |
| 443-636 | T-Mobile (Omnipoint) | Landline |
| 443-637 | Verizon Business (MCImetro) | Landline |
| 443-638 | Global Naps South | Landline |
| 443-639 | Windstream (Paetec) | Landline |
| 443-640 | Windstream (Paetec) | Landline |
| 443-641 | Lumen (Level 3) | VoIP |
| 443-642 | Verizon Wireless | Wireless |
| 443-643 | Verizon Maryland | Landline |
| 443-644 | Windstream (Paetec) | Landline |
| 443-645 | Windstream (Paetec) | Landline |
| 443-646 | Windstream (Paetec) | Landline |
| 443-647 | Windstream (Paetec) | Landline |
| 443-648 | AT&T (Teleport Communications) | Landline |
| 443-649 | Windstream (Paetec) | Landline |
| 443-650 | Verizon Business (MCImetro) | Landline |
| 443-651 | Verizon Wireless | Wireless |
| 443-652 | T-Mobile (Omnipoint) | Landline |
| 443-653 | T-Mobile (Omnipoint) | Landline |
| 443-654 | Verizon Maryland | Landline |
| 443-655 | AT&T Mobility | Wireless |
| 443-656 | Windstream (Paetec) | Landline |
| 443-657 | Lumen (Level 3) | VoIP |
| 443-658 | Onvoy (Sinch) | VoIP |
| 443-659 | Onvoy (Sinch) | VoIP |
| 443-660 | Comcast (Xfinity Voice) | VoIP |
| 443-661 | Windstream (Paetec) | Landline |
| 443-662 | Windstream (Paetec) | Landline |
| 443-663 | Verizon Maryland | Landline |
| 443-664 | Windstream (Paetec) | Landline |
| 443-665 | Core Communications | Landline |
| 443-666 | Lumen (Level 3) | VoIP |
| 443-667 | Verizon Wireless | Wireless |
| 443-668 | AT&T Mobility | Wireless |
| 443-669 | Windstream (Paetec) | Landline |
| 443-670 | Windstream (Paetec) | Landline |
| 443-671 | AT&T (Teleport Communications) | Landline |
| 443-672 | AT&T (Teleport Communications) | Landline |
| 443-673 | Windstream (Paetec) | Landline |
| 443-674 | AT&T (Teleport Communications) | Landline |
| 443-675 | Windstream (Paetec) | Landline |
| 443-676 | AT&T Mobility | Wireless |
| 443-677 | T-Mobile (Omnipoint) | Landline |
| 443-678 | Verizon Maryland | Landline |
| 443-679 | AT&T (Teleport Communications) | Landline |
| 443-680 | T-Mobile (Omnipoint) | Landline |
| 443-681 | Verizon Wireless | Wireless |
| 443-682 | Verizon Wireless | Wireless |
| 443-683 | Verizon Wireless | Wireless |
| 443-684 | Verizon Wireless | Wireless |
| 443-685 | Windstream (Paetec) | Landline |
| 443-686 | Verizon Wireless | Wireless |
| 443-687 | Verizon Wireless | Wireless |
| 443-688 | Windstream (Paetec) | Landline |
| 443-689 | Windstream (Paetec) | Landline |
| 443-690 | Verizon Wireless | Wireless |
| 443-691 | AT&T Mobility | Wireless |
| 443-692 | Verizon Business (MCImetro) | Landline |
| 443-693 | AT&T (Teleport Communications) | Landline |
| 443-694 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-695 | Verizon Wireless | Wireless |
| 443-696 | Windstream (Paetec) | Landline |
| 443-697 | Global Naps South | Landline |
| 443-698 | AT&T (Teleport Communications) | Landline |
| 443-699 | Verizon Wireless | Wireless |
| 443-701 | Verizon Business (MCImetro) | Landline |
| 443-702 | Windstream (Paetec) | Landline |
| 443-703 | Verizon Business (MCImetro) | Landline |
| 443-704 | Windstream (Paetec) | Landline |
| 443-705 | Verizon Wireless | Wireless |
| 443-706 | Windstream (Paetec) | Landline |
| 443-707 | T-Mobile (Omnipoint) | Landline |
| 443-708 | Lumen (Level 3) | VoIP |
| 443-709 | Windstream (Paetec) | Landline |
| 443-710 | Verizon Business (MCImetro) | Landline |
| 443-712 | Windstream (Paetec) | Landline |
| 443-713 | Peerless Network | VoIP |
| 443-714 | AT&T Mobility | Wireless |
| 443-715 | Windstream (Paetec) | Landline |
| 443-716 | Windstream (Paetec) | Landline |
| 443-717 | Verizon Wireless | Wireless |
| 443-718 | Windstream (Paetec) | Landline |
| 443-719 | Windstream (Paetec) | Landline |
| 443-720 | Verizon Business (MCImetro) | Landline |
| 443-721 | Verizon Wireless | Wireless |
| 443-722 | T-Mobile (Omnipoint) | Landline |
| 443-723 | T-Mobile (Omnipoint) | Landline |
| 443-724 | Windstream (Paetec) | Landline |
| 443-725 | Windstream (Paetec) | Landline |
| 443-726 | T-Mobile (Omnipoint) | Landline |
| 443-727 | Windstream (Paetec) | Landline |
| 443-728 | Windstream (Paetec) | Landline |
| 443-729 | Windstream (Paetec) | Landline |
| 443-730 | Windstream (Paetec) | Landline |
| 443-731 | AT&T (Teleport Communications) | Landline |
| 443-732 | AT&T (Teleport Communications) | Landline |
| 443-733 | AT&T (Teleport Communications) | Landline |
| 443-734 | Verizon Maryland | Landline |
| 443-735 | AT&T Mobility | Wireless |
| 443-736 | AT&T Mobility | Wireless |
| 443-737 | Windstream (Paetec) | Landline |
| 443-738 | Windstream (Paetec) | Landline |
| 443-739 | T-Mobile (Omnipoint) | Landline |
| 443-740 | Lumen (Level 3) | VoIP |
| 443-741 | Verizon Business (MCImetro) | Landline |
| 443-742 | AT&T Mobility | Wireless |
| 443-743 | Verizon Wireless | Wireless |
| 443-744 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-745 | Verizon Wireless | Wireless |
| 443-746 | Lumen (Level 3) | VoIP |
| 443-747 | Core Communications | Landline |
| 443-748 | Windstream (Paetec) | Landline |
| 443-749 | Windstream (Paetec) | Landline |
| 443-750 | Verizon Wireless | Wireless |
| 443-751 | Windstream (Paetec) | Landline |
| 443-752 | Verizon Wireless | Wireless |
| 443-753 | Verizon Business (MCImetro) | Landline |
| 443-754 | Verizon Wireless | Wireless |
| 443-755 | Verizon Maryland | Landline |
| 443-756 | AT&T Mobility | Wireless |
| 443-757 | Windstream (Paetec) | Landline |
| 443-758 | Verizon Wireless | Wireless |
| 443-759 | Verizon Wireless | Wireless |
| 443-760 | AT&T Local | Landline |
| 443-761 | T-Mobile (Omnipoint) | Landline |
| 443-762 | T-Mobile (Omnipoint) | Landline |
| 443-763 | T-Mobile (Omnipoint) | Landline |
| 443-764 | T-Mobile (Omnipoint) | Landline |
| 443-765 | AT&T Mobility | Wireless |
| 443-766 | Windstream (Paetec) | Landline |
| 443-767 | Windstream (Paetec) | Landline |
| 443-768 | T-Mobile (Omnipoint) | Landline |
| 443-769 | T-Mobile (Omnipoint) | Landline |
| 443-770 | Verizon Maryland | Landline |
| 443-771 | Verizon Wireless | Wireless |
| 443-772 | Windstream (Paetec) | Landline |
| 443-773 | Verizon Business (MCImetro) | Landline |
| 443-774 | AT&T Mobility | Wireless |
| 443-775 | Verizon Wireless | Wireless |
| 443-776 | Bandwidth.com | VoIP |
| 443-777 | Verizon Maryland | Landline |
| 443-778 | Verizon Maryland | Landline |
| 443-779 | Verizon Business (MCImetro) | Landline |
| 443-780 | Windstream (Paetec) | Landline |
| 443-781 | Onvoy (Sinch) | VoIP |
| 443-782 | Verizon Business (MCImetro) | Landline |
| 443-783 | Verizon Wireless | Wireless |
| 443-784 | AT&T (Teleport Communications) | Landline |
| 443-785 | Onvoy (Sinch) | VoIP |
| 443-786 | Verizon Wireless | Wireless |
| 443-787 | Windstream (Paetec) | Landline |
| 443-788 | T-Mobile (Omnipoint) | Landline |
| 443-789 | AT&T Mobility | Wireless |
| 443-790 | T-Mobile (Omnipoint) | Landline |
| 443-791 | AT&T Mobility | Wireless |
| 443-792 | Verizon Maryland | Landline |
| 443-793 | Verizon Business (MCImetro) | Landline |
| 443-794 | AT&T Mobility | Wireless |
| 443-795 | Verizon Business (MCImetro) | Landline |
| 443-796 | Verizon Business (MCImetro) | Landline |
| 443-797 | Verizon Business (MCImetro) | Landline |
| 443-798 | Lumen (Level 3) | VoIP |
| 443-799 | AT&T Mobility | Wireless |
| 443-800 | T-Mobile (Omnipoint) | Landline |
| 443-801 | T-Mobile (Omnipoint) | Landline |
| 443-802 | T-Mobile (Omnipoint) | Landline |
| 443-803 | T-Mobile (Omnipoint) | Landline |
| 443-804 | T-Mobile (Omnipoint) | Landline |
| 443-805 | T-Mobile (Omnipoint) | Landline |
| 443-806 | T-Mobile (Omnipoint) | Landline |
| 443-807 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-808 | Bandwidth.com | VoIP |
| 443-809 | Lumen (Level 3) | VoIP |
| 443-810 | T-Mobile (Omnipoint) | Landline |
| 443-812 | Verizon Wireless | Wireless |
| 443-813 | Verizon Wireless | Wireless |
| 443-814 | Verizon Wireless | Wireless |
| 443-815 | Verizon Business (MCImetro) | Landline |
| 443-816 | Verizon Business (MCImetro) | Landline |
| 443-817 | Verizon Business (MCImetro) | Landline |
| 443-818 | Lumen (Level 3) | VoIP |
| 443-819 | T-Mobile (Omnipoint) | Landline |
| 443-820 | Windstream (Paetec) | Landline |
| 443-821 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-822 | T-Mobile (Omnipoint) | Landline |
| 443-823 | Verizon Wireless | Wireless |
| 443-824 | T-Mobile (Omnipoint) | Landline |
| 443-825 | T-Mobile (Omnipoint) | Landline |
| 443-826 | Verizon Wireless | Wireless |
| 443-827 | Verizon Wireless | Wireless |
| 443-828 | Windstream (Paetec) | Landline |
| 443-829 | T-Mobile (Omnipoint) | Landline |
| 443-830 | Windstream (Paetec) | Landline |
| 443-831 | AT&T Mobility | Wireless |
| 443-832 | Lumen (Level 3) | VoIP |
| 443-833 | Windstream (Paetec) | Landline |
| 443-834 | Verizon Wireless | Wireless |
| 443-835 | Verizon Wireless | Wireless |
| 443-836 | Verizon Business (MCImetro) | Landline |
| 443-837 | Windstream (Paetec) | Landline |
| 443-838 | AT&T Mobility | Wireless |
| 443-839 | T-Mobile (Omnipoint) | Landline |
| 443-840 | AT&T Mobility | Wireless |
| 443-841 | Verizon Maryland | Landline |
| 443-842 | Verizon Wireless | Wireless |
| 443-843 | Verizon Maryland | Landline |
| 443-844 | Verizon Wireless | Wireless |
| 443-845 | Verizon Wireless | Wireless |
| 443-846 | AT&T Mobility | Wireless |
| 443-847 | Verizon Wireless | Wireless |
| 443-848 | T-Mobile (Omnipoint) | Landline |
| 443-849 | Verizon Maryland | Landline |
| 443-850 | T-Mobile (Omnipoint) | Landline |
| 443-851 | T-Mobile (Omnipoint) | Landline |
| 443-852 | AT&T Mobility | Wireless |
| 443-853 | Verizon Wireless | Wireless |
| 443-854 | T-Mobile (Omnipoint) | Landline |
| 443-855 | Windstream (Paetec) | Landline |
| 443-856 | Core Communications | Landline |
| 443-857 | T-Mobile (Omnipoint) | Landline |
| 443-858 | T-Mobile (Omnipoint) | Landline |
| 443-859 | T-Mobile (Omnipoint) | Landline |
| 443-860 | AT&T Mobility | Wireless |
| 443-861 | Verizon Maryland | Landline |
| 443-862 | Verizon Wireless | Wireless |
| 443-863 | Verizon Wireless | Wireless |
| 443-864 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-865 | T-Mobile (Omnipoint) | Landline |
| 443-866 | T-Mobile (Omnipoint) | Landline |
| 443-867 | Windstream (Paetec) | Landline |
| 443-868 | Verizon Maryland | Landline |
| 443-869 | Verizon Wireless | Wireless |
| 443-870 | Lumen (Level 3) | VoIP |
| 443-871 | T-Mobile (Omnipoint) | Landline |
| 443-872 | Windstream (Paetec) | Landline |
| 443-873 | Onvoy (Sinch) | VoIP |
| 443-874 | Windstream (Paetec) | Landline |
| 443-875 | AT&T Mobility | Wireless |
| 443-876 | T-Mobile (Omnipoint) | Landline |
| 443-877 | Lumen (Level 3) | VoIP |
| 443-878 | Verizon Wireless | Wireless |
| 443-879 | Verizon Maryland | Landline |
| 443-880 | AT&T (Teleport Communications) | Landline |
| 443-881 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-882 | T-Mobile (Omnipoint) | Landline |
| 443-883 | AT&T (Teleport Communications) | Landline |
| 443-884 | Windstream (Paetec) | Landline |
| 443-885 | Verizon Maryland | Landline |
| 443-886 | AT&T (Teleport Communications) | Landline |
| 443-887 | Windstream (Paetec) | Landline |
| 443-888 | Windstream (Paetec) | Landline |
| 443-889 | T-Mobile (Omnipoint) | Landline |
| 443-890 | Verizon Wireless | Wireless |
| 443-891 | Verizon Business (MCImetro) | Landline |
| 443-892 | Bandwidth.com | VoIP |
| 443-893 | Verizon Business (MCImetro) | Landline |
| 443-894 | T-Mobile (Omnipoint) | Landline |
| 443-895 | Verizon Wireless | Wireless |
| 443-896 | AT&T (Teleport Communications) | Landline |
| 443-897 | AT&T Mobility | Wireless |
| 443-898 | Lumen (Level 3) | VoIP |
| 443-899 | Lumen (Level 3) | VoIP |
| 443-900 | Verizon Wireless | Wireless |
| 443-901 | Windstream (Paetec) | Landline |
| 443-902 | Verizon Wireless | Wireless |
| 443-903 | Verizon Wireless | Wireless |
| 443-904 | Verizon Wireless | Wireless |
| 443-905 | AT&T Mobility | Wireless |
| 443-906 | Peerless Network | VoIP |
| 443-907 | Verizon Wireless | Wireless |
| 443-908 | Verizon Wireless | Wireless |
| 443-909 | Verizon Wireless | Wireless |
| 443-910 | AT&T Mobility | Wireless |
| 443-912 | Core Communications | Landline |
| 443-913 | T-Mobile (Omnipoint) | Landline |
| 443-914 | AT&T (Teleport Communications) | Landline |
| 443-915 | Verizon Wireless | Wireless |
| 443-916 | T-Mobile (Omnipoint) | Landline |
| 443-917 | Onvoy (Sinch) | VoIP |
| 443-918 | AT&T (Teleport Communications) | Landline |
| 443-919 | Windstream (Paetec) | Landline |
| 443-920 | AT&T (Teleport Communications) | Landline |
| 443-921 | Windstream (Paetec) | Landline |
| 443-922 | Windstream (Paetec) | Landline |
| 443-923 | Windstream (Paetec) | Landline |
| 443-924 | Verizon Wireless | Wireless |
| 443-925 | T-Mobile (Omnipoint) | Landline |
| 443-926 | Lumen (Level 3) | VoIP |
| 443-927 | Lumen (Level 3) | VoIP |
| 443-928 | Verizon Wireless | Wireless |
| 443-929 | T-Mobile (Omnipoint) | Landline |
| 443-930 | Verizon Wireless | Wireless |
| 443-931 | Verizon Business (MCImetro) | Landline |
| 443-932 | T-Mobile (Omnipoint) | Landline |
| 443-933 | AT&T (Teleport Communications) | Landline |
| 443-934 | Verizon Wireless | Wireless |
| 443-935 | AT&T Mobility | Wireless |
| 443-936 | AT&T Mobility | Wireless |
| 443-937 | AT&T (Teleport Communications) | Landline |
| 443-938 | Verizon Wireless | Wireless |
| 443-939 | T-Mobile (Omnipoint) | Landline |
| 443-940 | Windstream (Paetec) | Landline |
| 443-941 | AT&T Mobility | Wireless |
| 443-942 | AT&T (Teleport Communications) | Landline |
| 443-943 | AT&T (Teleport Communications) | Landline |
| 443-944 | Comcast (Xfinity Voice) | VoIP |
| 443-945 | AT&T Mobility | Wireless |
| 443-946 | Core Communications | Landline |
| 443-947 | Windstream (Paetec) | Landline |
| 443-948 | T-Mobile (Omnipoint) | Landline |
| 443-949 | Comcast (Xfinity Voice) | VoIP |
| 443-951 | Lumen (Level 3) | VoIP |
| 443-952 | Verizon Wireless | Wireless |
| 443-953 | Verizon Wireless | Wireless |
| 443-954 | Windstream (Paetec) | Landline |
| 443-955 | Verizon Wireless | Wireless |
| 443-956 | AT&T Mobility | Wireless |
| 443-957 | AT&T Local | Landline |
| 443-960 | Verizon Wireless | Wireless |
| 443-961 | Intrado Communications | Landline |
| 443-962 | Verizon Wireless | Wireless |
| 443-963 | Bandwidth.com | VoIP |
| 443-964 | Lumen (Level 3) | VoIP |
| 443-965 | T-Mobile (Omnipoint) | Landline |
| 443-966 | Verizon Wireless | Wireless |
| 443-967 | Verizon Maryland | Landline |
| 443-968 | AT&T Mobility | Wireless |
| 443-969 | Windstream (Paetec) | Landline |
| 443-970 | Verizon Wireless | Wireless |
| 443-971 | Bandwidth.com | VoIP |
| 443-972 | Windstream (Paetec) | Landline |
| 443-973 | Verizon Business (MCImetro) | Landline |
| 443-974 | AT&T (Teleport Communications) | Landline |
| 443-975 | AT&T Mobility | Wireless |
| 443-977 | Verizon Wireless | Wireless |
| 443-978 | Verizon Wireless | Wireless |
| 443-979 | Verizon Wireless | Wireless |
| 443-980 | AT&T Mobility | Wireless |
| 443-981 | Verizon Wireless | Wireless |
| 443-982 | Ymax Communications | Landline |
| 443-983 | T-Mobile (Omnipoint) | Landline |
| 443-984 | Verizon Maryland | Landline |
| 443-985 | T-Mobile (Omnipoint) | Landline |
| 443-986 | Verizon Wireless | Wireless |
| 443-987 | Verizon Wireless | Wireless |
| 443-988 | Lumen (Level 3) | VoIP |
| 443-989 | Windstream (Paetec) | Landline |
| 443-990 | Bandwidth.com | VoIP |
| 443-991 | Verizon Wireless | Wireless |
| 443-992 | Lumen (Level 3) | VoIP |
| 443-993 | Metro by T-Mobile (MetroPCS) | Wireless |
| 443-994 | AT&T Mobility | Wireless |
| 443-995 | AT&T Mobility | Wireless |
| 443-996 | AT&T Mobility | Wireless |
| 443-997 | Verizon Maryland | Landline |
| 443-998 | Verizon Maryland | Landline |
Line type reflects the registry assignment; ported numbers can differ. Unknown 443 number calling? ActiveArmor® screens it before you ever look it up.
Cities & Communities in and around Area Code 443
Communities the 443 serves, filtered against the numbering registry’s rate centers, with each community’s key ZIP codes and the AT&T home internet available there. Cities link to their local AT&T internet page.
| City / community | Key ZIP codes | AT&T internet |
|---|---|---|
| Aberdeen | 21001, 21130, 21078 | Internet Air |
| Aberdeen Proving Ground | 21005, 21130, 21001 | Internet Air |
| Abingdon | 21009, 21017, 21040 | Internet Air |
| Annapolis | 21402, 21403, 21401 | Internet Air |
| Baltimore | 21202, 21233, 21201 | Internet Air |
| Bel Air | 26753, 21542, 21557 | Internet Air |
| Berlin | 21811, 21862, 21813 | Internet Air |
| Bishopville | 21813, 19975, 21862 | Internet Air |
| Cambridge | 21613, 21673, 21677 | Internet Air |
| Catonsville | 21228, 21250, 21229 | Internet Air |
| Centreville | 21617, 21623 | Internet Air |
| Charlestown | 21914, 21901, 21903 | Internet Air |
| Chesapeake City | 21915, 19701, 21921 | Internet Air |
| Chestertown | 21620, 21678 | Internet Air |
| Cockeysville | 21031, 21093, 21131 | Internet Air |
| Columbia | 21044, 21045, 21046 | Internet Air |
| Crisfield | 21817, 21838 | Check address |
| Crofton | 21114, 21054, 20715 | Internet Air |
| Crownsville | 21032, 21405, 21401 | Internet Air |
| Darlington | 21034, 21918, 21028 | Internet Air |
| Delmar | 21875, 19940, 19956 | Internet Air |
| Denton | 21629, 21639, 21660 | Internet Air |
| Dundalk | 21222, 21224, 21221 | Internet Air |
| Easton | 21601, 21653, 21654 | Internet Air |
| Eden | 21822, 21810, 21826 | Internet Air |
| Edgewater | 21037, 21140, 21403 | Internet Air |
| Edgewood | 21040, 21010, 21009 | Internet Air |
| Eldersburg | 21784, 21104, 21723 | Check address |
| Elkridge | 21075, 21076, 21077 | Internet Air |
| Elkton | 21921, 21920, 19702 | Internet Air |
| Ellicott City | 21043, 21042, 21163 | Internet Air |
| Essex | 21221, 21222, 21237 | Internet Air |
| Fallston | 21047, 21013, 21082 | Internet Air |
| Fruitland | 21826, 21822, 21801 | Internet Air |
| Glen Burnie | 21061, 21060, 21240 | Internet Air |
| Hampstead | 21074, 21155, 21102 | Internet Air |
| Havre De Grace | 21078, 21902, 21903 | Internet Air |
| Hebron | 21830, 21837, 21801 | Internet Air |
| Huntingtown | 20639, 20689, 20608 | Internet Air |
| Jarrettsville | 21084, 21050, 21047 | Internet Air |
| Jessup | 20794, 20701, 20763 | Internet Air |
| Kingsville | 21087, 21051, 21156 | Internet Air |
| Laurel | 20707, 20723, 20763 | Internet Air |
| Lutherville | 21204, 21093, 21252 | Check address |
| Manchester | 21074, 21102, 21155 | Internet Air |
| Mardela Springs | 21837, 21830, 21861 | Internet Air |
| Middle River | 21220, 21221, 21237 | Internet Air |
| Mount Airy | 21771, 21797, 21770 | Internet Air |
| Nanticoke | 21840, 21814, 21865 | Check address |
| New Windsor | 21776, 21791, 21157 | Internet Air |
| North Beach | 20714, 20758, 20732 | Internet Air |
| North East | 21901, 21914, 21921 | Internet Air |
| Ocean City | 21842, 19944, 21813 | Internet Air |
| Odenton | 21054, 21113, 20755 | Internet Air |
| Owings | 20736, 20758, 20689 | Internet Air |
| Owings Mills | 21117, 21133, 21136 | Internet Air |
| Parkville | 21234, 21214, 21239 | Internet Air |
| Parsonsburg | 21849, 21875, 21850 | Internet Air |
| Pasadena | 21060, 21226, 21061 | Internet Air |
| Perry Hall | 21236, 21128, 21234 | Internet Air |
| Perryville | 21903, 21902, 21904 | Internet Air |
| Pikesville | 21208, 21153, 21209 | Internet Air |
| Pocomoke City | 21851, 23415 | Internet Air |
| Port Deposit | 21904, 21903, 21917 | Internet Air |
| Princess Anne | 21853, 21890, 21810 | Internet Air |
| Queen Anne | 20716, 20774, 20721 | Internet Air |
| Queenstown | 21658, 21638, 21679 | Internet Air |
| Randallstown | 21133, 21244, 21163 | Internet Air |
| Reisterstown | 21136, 21071, 21117 | Internet Air |
| Rosedale | 21237, 21206, 21205 | Internet Air |
| Salisbury | 21826, 21875, 21804 | Internet Air |
| Savage | 20763, 20794, 20701 | Internet Air |
| Severn | 21144, 21077, 21076 | Internet Air |
| Severna Park | 21146, 21108, 21405 | Internet Air |
| Shady Side | 20764, 20733, 20765 | Check address |
| Snow Hill | 21863, 21829, 21841 | Internet Air |
| Solomons | 20629, 20688, 20657 | Check address |
| Stevensville | 21666, 21619, 21638 | Internet Air |
| Sykesville | 21784, 21723, 21104 | Internet Air |
| Taneytown | 21787, 21757, 21158 | Internet Air |
| Towson | 21252, 21285, 21204 | Internet Air |
| Trappe | 21673, 21654, 21664 | Internet Air |
| Union Bridge | 21791, 21757, 21776 | Internet Air |
| Westminster | 21157, 21158, 21776 | Internet Air |
| White Marsh | 21236, 21128, 21162 | Internet Air |
| Willards | 21874, 21872, 21850 | Internet Air |
City list: AT&T service-area records and the public numbering registry. Key ZIPs: U.S. Census data for each community. Internet type: AT&T eligibility data, June 2026. Availability is always confirmed at your exact address.
443 Area Code Map
Area code 443 serves Baltimore and nearby communities in MD.
↓ Printable PDF
Open the printable 443 map (PDF) · All Maryland area codes · Home internet in Baltimore
Counties Covered by the 443 Area Code
Counties are served in whole or in part; population is U.S. Census Bureau ACS 2023. The 443 also reaches parts of Howard County, Harford County, Carroll County, Cecil County, Wicomico County, Calvert County, Allegany County, Worcester County and 6 more.
The 443, explained
Area Code 443: More Than a Number in Baltimore
In Baltimore, the 443 is more than digits on a caller ID. It arrived in 1997, layered onto the 410 region, and it has meant Baltimore and surrounding communities ever since — 785 carrier prefixes keep its lines busy today, and an established 443 number still says you’ve been here a while.
The map tells its own story: Baltimore and surrounding communities, with 410 and 667 sharing the same streets today. Several codes, one local calling area, no long-distance between any of them — only the 443 came first.
Keeping a 443 matters here. An existing 443 number ports to a new phone, a new carrier, or a new AT&T line, and stays yours anywhere in the U.S. New lines in the area often draw 410 instead — one more reason locals hold on to theirs.
Need a new local number? Shop plans Keep your 443: bring it to AT&TInternet, wireless & stores in the 443
AT&T Home Internet in Area Code 443
AT&T home internet serves communities across area code 443, with AT&T Fiber where it’s built and AT&T Internet Air covering the gaps. Availability is decided address by address; every community in the table above links to its local internet page.
No data capsNo annual contractNo equipment fees
AT&T Fiber: Ltd. avail/areas. Speeds based on wired connection. Actual speeds vary. For 5-GIG, single device wired speed maximum 4.7Gbps. For more info., visit att.com/speed101. AT&T Internet Air: AT&T Internet Air not available in all areas. In rare cases, if your usage is contributing to congestion on the network, AT&T will greatly reduce your speed for a minimum of 30 min.
Pair it with wireless in an internet + wireless bundle. Run a business in the 443? AT&T Business Internet is available at many addresses.
Fiber install day in the 443Check your address ›
Moving to Area Code 443?
Set up home internet in area code 443 before the boxes arrive, and find your new community in the table above or check your exact address below.
Your number moves with you: port your 443 number from anywhere, or keep your old number when you arrive. An AT&T store nearby can handle the whole switch in one visit.
1 · Check your addressSee Fiber or Internet Air availability in seconds.
2 · Schedule for move-in dayInstall lined up before the boxes arrive.
3 · Keep your numberYour mobile number ports; your internet moves.
Get set up before move-in dayPlan your move ›
AT&T Wireless in Area Code 443
AT&T’s 5G network covers most of area code 443. ActiveArmor® spam blocking is included with every unlimited plan, your 443 number stays yours, and great cell phone deals in Baltimore are a tap away.
5G across the 443ActiveArmor® includedKeep your 443 number
AT&T may temporarily slow data speeds if the network is busy. 5G req’s compatible plan & device. Coverage not available everywhere. Learn more at att.com/5Gforyou.
Need a new 443 number? Ask when you activate a line: the 443 shares its territory with 410 and 667, so new lines may draw one of those codes, and porting an existing 443 number keeps it yours.
Stay connected across BaltimoreShop wireless plans ›
AT&T Stores in Area Code 443
Looking for cell phone stores in area code 443? These stores answer on 443 numbers — walk in for switching, porting, upgrades and hands-on help:
Every AT&T store in the region, company owned and authorized retailer alike, each with its own store page.
Real help from real people in BaltimoreFind your store ›
All AT&T Stores with 443 Numbers
Every store below answers on a 443 number. Tap any number to call.
9 AT&T stores with 443 numbers
International Calling from Area Code 443
Calling abroad from area code 443? AT&T International Calling adds discounted or unlimited rates to 200+ countries on top of your existing plan, and unlimited texting from the U.S. to 200+ destinations is already included on AT&T unlimited plans.
Where the 443 calls most:El SalvadorIndiaNigeriaGuatemalaChina
Top places of birth among foreign-born residents of the 443’s counties, U.S. Census Bureau ACS 2023.
Calling abroad from a 443 number: dial 011 + country code + number (or just + on a mobile). Traveling abroad instead? International Day Pass® takes your talk, text and data with you for a flat daily rate.
International Calling and International Day Pass® availability, rates and included destinations vary by plan; see att.com for the current country list.
Baltimore calls the worldSee international plans ›
443 Area Code Quick Facts & Dialing
StateMaryland
Time zoneEastern
Established1997added to the 410 region
Dialing10 digitsrequired
Toll-free?Nogeographic code
Population4.38Mcounties served, Census 2023
Largest cityBaltimore+85 more ›
How to dial a 443 number
| Scenario | Format | Example |
|---|---|---|
| Local call (within the region) | 443 + 7-digit number | (443) 555-0100 |
| Long distance (within the U.S.) | 1 + 443 + 7-digit number | 1 (443) 555-0100 |
| Calling 443 from another country | +1 443 + 7-digit number | +1 443 555 0100 |
| From a mobile phone | (443) + 7-digit number | (443) 555-0100 |
A Short History of Area Code 443
Added in 1997 to the 410 region, the 443 serves Baltimore and surrounding communities.
1997Added to the 410 region
2012First overlay: 667
Area Code 443 vs the related codes
| Code | Added | Type | Where it works |
|---|---|---|---|
| 443 | 1997 | Overlay | Baltimore and surrounding communities |
| 667 | 2012 | Overlay | Same territory as the 443 |
Same rates, same local dialing: a number from any code in the region works exactly like a 443.
Nearby & Related Area Codes
Browse area codes by state: Maryland (6) · California (41) · Texas (29) · Florida (23) · all 50 states ›
Area Code 443 FAQ
What area code is 443?
443 is the area code for Baltimore, Maryland and the surrounding communities. It appears at the front of every local 10-digit phone number in the area.
Where is area code 443?
Area code 443 serves Baltimore, Maryland and nearby communities including Aberdeen Proving Ground, Abingdon, Annapolis. The full city list is in the cities table above.
Why did I get a text message from a 443 number?
The most common 443 text scam opens like a wrong number (“u at home?”, “are you busy tomorrow?”) and tries to move you to WhatsApp. Don’t reply. Forward the text to 7726 (SPAM) and delete it. AT&T ActiveArmor® filters known scam senders automatically.
Who called me from area code 443?
A 443 number usually means Baltimore or a nearby community, but spoofing is common. This page’s prefix lookup isn’t a reverse phone lookup — it can’t name the caller, but it shows the carrier, line type and community a number was issued to, which is often enough to judge a call.
What time zone is area code 443?
Eastern time. The live local time is shown at the top of this page.
Why am I getting calls from 443 numbers?
443 is an active, legitimate Maryland area code, but scammers spoof local numbers because people answer them. If there’s no voicemail, let it go. AT&T ActiveArmor® blocks and labels spam automatically, and you can report unwanted calls at reportfraud.ftc.gov. The spam report board above shows which 443 prefixes are drawing complaints right now.
Is 443 a toll-free number?
No. 443 is a geographic area code tied to Baltimore, Maryland. Toll-free calls come from 800, 833, 844, 855, 866, 877 and 888 numbers.
What’s the difference between 443 and 410?
Nothing on the map: 443 is an overlay of 410, covering the same Baltimore area. Calls between them are local; only the three digits at the front differ.
Which cities use area code 443?
The largest communities include Aberdeen, Aberdeen Proving Ground, Abingdon, Annapolis, Baltimore. The full list is in the cities table above.
Does AT&T offer service in the 443?
Yes: home internet, wireless and retail stores across the 443. Availability is checked address by address.
Can I still get a 443 number?
Yes. Carriers in Baltimore and across the 443 still issue 443 numbers on new lines, and you can port an existing 443 number to any carrier. Newer lines in the same area may also receive numbers from an overlay code.
Can I keep my 443 number if I move?
Yes. Phone numbers are portable: your 443 number can move with you anywhere in the U.S., whether you stay with your carrier or switch.
Sources: city and store data from AT&T records; prefix and carrier assignments from the public numbering registry (pulled July 2026). Facts regenerate monthly.
