Who Called Me from Area Code 203?
Quick answerA 203 call usually comes from Bridgeport 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 203 prefixes, right on this page.
- Curious who issued a number? Every 203 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 203 prefixes this month
PrefixReported patternReport volume
(203) 379-XXXXRobocall-heavy
(203) 646-XXXXRobocall-heavy
(203) 290-XXXXRobocall-heavy
(203) 202-XXXXRobocall-heavy
(203) 693-XXXXRobocall-heavy
299 unwanted-call reports naming 203 numbers in FTC Do Not Call complaint data, July 2–17, 2026. Consumer-reported and unverified.
Block spam calls in the 203, 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 203 a Scam?
No. 203 is a legitimate Bridgeport area code.
It’s one of the original 1947 codes and serves Bridgeport and surrounding communities. But legitimacy of the code says nothing about any single call. Scammers spoof local numbers constantly.
The code is realOriginal 1947 code for the Bridgeport area with 784 assigned carrier prefixes.
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 203 numbers
The most common area code 203 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 203
Caller ID is easy to forge. Spoofing fakes the number a call displays. The real owner of that 203 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 203 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 203 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.
203 Area Code Prefix & Carrier Lookup
The three digits after the area code identify the carrier a number was issued to. All 784 assigned 203 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 203 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.
784 prefixes · updated monthly
| Prefix | Carrier | Line type |
|---|---|---|
| 203-200 | Bandwidth.com | VoIP |
| 203-201 | Spok (paging) | Landline |
| 203-202 | Optimum (Lightpath) | VoIP |
| 203-203 | Onvoy (Sinch) | VoIP |
| 203-204 | AT&T (Teleport Communications) | Landline |
| 203-205 | Frontier Communications | Landline |
| 203-206 | AT&T Mobility | Wireless |
| 203-207 | Frontier Communications | Landline |
| 203-208 | Comcast (Xfinity Voice) | VoIP |
| 203-209 | Verizon Wireless | Wireless |
| 203-210 | Optimum (Lightpath) | VoIP |
| 203-212 | AT&T Mobility | Wireless |
| 203-213 | AT&T Mobility | Wireless |
| 203-214 | AT&T Mobility | Wireless |
| 203-215 | AT&T Mobility | Wireless |
| 203-216 | AT&T Mobility | Wireless |
| 203-217 | AT&T Mobility | Wireless |
| 203-218 | AT&T Mobility | Wireless |
| 203-219 | AT&T Mobility | Wireless |
| 203-220 | Optimum (Lightpath) | VoIP |
| 203-221 | Frontier Communications | Landline |
| 203-222 | Frontier Communications | Landline |
| 203-223 | T-Mobile (Omnipoint) | Landline |
| 203-224 | Frontier Communications | Landline |
| 203-225 | Frontier Communications | Landline |
| 203-226 | Frontier Communications | Landline |
| 203-227 | Frontier Communications | Landline |
| 203-228 | Verizon Wireless | Wireless |
| 203-229 | Frontier Communications | Landline |
| 203-230 | Frontier Communications | Landline |
| 203-231 | Verizon Wireless | Wireless |
| 203-232 | Verizon Wireless | Wireless |
| 203-233 | Verizon Wireless | Wireless |
| 203-234 | Frontier Communications | Landline |
| 203-235 | Frontier Communications | Landline |
| 203-236 | Frontier Communications | Landline |
| 203-237 | Frontier Communications | Landline |
| 203-238 | Frontier Communications | Landline |
| 203-239 | Frontier Communications | Landline |
| 203-240 | Verizon Wireless | Wireless |
| 203-241 | Verizon Wireless | Wireless |
| 203-242 | Optimum (Lightpath) | VoIP |
| 203-243 | T-Mobile (Omnipoint) | Landline |
| 203-244 | Csc Voice | Landline |
| 203-245 | Frontier Communications | Landline |
| 203-246 | Verizon Wireless | Wireless |
| 203-247 | Verizon Wireless | Wireless |
| 203-248 | Frontier Communications | Landline |
| 203-249 | Verizon Wireless | Wireless |
| 203-250 | Frontier Communications | Landline |
| 203-251 | Frontier Communications | Landline |
| 203-252 | Optimum (Lightpath) | VoIP |
| 203-253 | Verizon Wireless | Wireless |
| 203-254 | Frontier Communications | Landline |
| 203-255 | Frontier Communications | Landline |
| 203-256 | Frontier Communications | Landline |
| 203-257 | Verizon Wireless | Wireless |
| 203-258 | Verizon Wireless | Wireless |
| 203-259 | Frontier Communications | Landline |
| 203-260 | AT&T Mobility | Wireless |
| 203-261 | Frontier Communications | Landline |
| 203-262 | Frontier Communications | Landline |
| 203-263 | Frontier Communications | Landline |
| 203-264 | Frontier Communications | Landline |
| 203-265 | Frontier Communications | Landline |
| 203-266 | Frontier Communications | Landline |
| 203-267 | Frontier Communications | Landline |
| 203-268 | Frontier Communications | Landline |
| 203-269 | Frontier Communications | Landline |
| 203-270 | Frontier Communications | Landline |
| 203-271 | Frontier Communications | Landline |
| 203-272 | Frontier Communications | Landline |
| 203-273 | Verizon Wireless | Wireless |
| 203-274 | AT&T Mobility | Wireless |
| 203-275 | Frontier Communications | Landline |
| 203-276 | Optimum (Lightpath) | VoIP |
| 203-277 | Verizon Business (MCImetro) | Landline |
| 203-278 | T-Mobile (Omnipoint) | Landline |
| 203-279 | Spok (paging) | Landline |
| 203-280 | Verizon Business (MCImetro) | Landline |
| 203-281 | Frontier Communications | Landline |
| 203-282 | Spok (paging) | Landline |
| 203-283 | Optimum (Lightpath) | VoIP |
| 203-284 | Frontier Communications | Landline |
| 203-285 | AT&T (Teleport Communications) | Landline |
| 203-286 | Windstream (Paetec) | Landline |
| 203-287 | Frontier Communications | Landline |
| 203-288 | Frontier Communications | Landline |
| 203-289 | Spok (paging) | Landline |
| 203-290 | T-Mobile (Omnipoint) | Landline |
| 203-291 | Frontier Communications | Landline |
| 203-292 | Optimum (Lightpath) | VoIP |
| 203-293 | Verizon Business (MCImetro) | Landline |
| 203-294 | Frontier Communications | Landline |
| 203-295 | Verizon Business (MCImetro) | Landline |
| 203-296 | Verizon Business (MCImetro) | Landline |
| 203-297 | Verizon Business (MCImetro) | Landline |
| 203-298 | Optimum (Lightpath) | VoIP |
| 203-299 | Frontier Communications | Landline |
| 203-300 | T-Mobile (Omnipoint) | Landline |
| 203-301 | Frontier Communications | Landline |
| 203-302 | AT&T (Teleport Communications) | Landline |
| 203-303 | AT&T (Teleport Communications) | Landline |
| 203-304 | AT&T (Teleport Communications) | Landline |
| 203-305 | AT&T Mobility | Wireless |
| 203-306 | Windstream (Paetec) | Landline |
| 203-307 | Verizon Business (MCImetro) | Landline |
| 203-308 | Verizon Wireless | Wireless |
| 203-309 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-310 | Verizon Business (MCImetro) | Landline |
| 203-312 | Frontier Communications | Landline |
| 203-313 | Verizon Wireless | Wireless |
| 203-314 | Verizon Wireless | Wireless |
| 203-315 | Frontier Communications | Landline |
| 203-316 | Frontier Communications | Landline |
| 203-317 | Frontier Communications | Landline |
| 203-318 | Frontier Communications | Landline |
| 203-319 | Frontier Communications | Landline |
| 203-320 | Verizon Business (MCImetro) | Landline |
| 203-321 | Frontier Communications | Landline |
| 203-322 | Frontier Communications | Landline |
| 203-323 | Frontier Communications | Landline |
| 203-324 | Frontier Communications | Landline |
| 203-325 | Frontier Communications | Landline |
| 203-326 | Frontier Communications | Landline |
| 203-327 | Frontier Communications | Landline |
| 203-328 | Frontier Communications | Landline |
| 203-329 | Frontier Communications | Landline |
| 203-330 | Frontier Communications | Landline |
| 203-331 | Frontier Communications | Landline |
| 203-332 | Frontier Communications | Landline |
| 203-333 | Frontier Communications | Landline |
| 203-334 | Frontier Communications | Landline |
| 203-335 | Frontier Communications | Landline |
| 203-336 | Frontier Communications | Landline |
| 203-337 | Frontier Communications | Landline |
| 203-338 | Frontier Communications | Landline |
| 203-339 | Frontier Communications | Landline |
| 203-340 | Optimum (Lightpath) | VoIP |
| 203-341 | Frontier Communications | Landline |
| 203-342 | Spok (paging) | Landline |
| 203-343 | AT&T Mobility | Wireless |
| 203-344 | Optimum (Lightpath) | VoIP |
| 203-345 | Optimum (Lightpath) | VoIP |
| 203-346 | Frontier Communications | Landline |
| 203-347 | Lumen (Level 3) | VoIP |
| 203-348 | Frontier Communications | Landline |
| 203-349 | AT&T (Teleport Communications) | Landline |
| 203-350 | AT&T (Teleport Communications) | Landline |
| 203-351 | Frontier Communications | Landline |
| 203-352 | Frontier Communications | Landline |
| 203-353 | Frontier Communications | Landline |
| 203-354 | Optimum (Lightpath) | VoIP |
| 203-355 | Optimum (Lightpath) | VoIP |
| 203-356 | Frontier Communications | Landline |
| 203-357 | Frontier Communications | Landline |
| 203-358 | Frontier Communications | Landline |
| 203-359 | Frontier Communications | Landline |
| 203-360 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-361 | Lumen (Level 3) | VoIP |
| 203-362 | Frontier Communications | Landline |
| 203-363 | Frontier Communications | Landline |
| 203-364 | Frontier Communications | Landline |
| 203-365 | Frontier Communications | Landline |
| 203-366 | Frontier Communications | Landline |
| 203-367 | Frontier Communications | Landline |
| 203-368 | Frontier Communications | Landline |
| 203-369 | Verizon Business (MCImetro) | Landline |
| 203-370 | American Messaging (paging) | Landline |
| 203-371 | Frontier Communications | Landline |
| 203-372 | Frontier Communications | Landline |
| 203-373 | Frontier Communications | Landline |
| 203-374 | Frontier Communications | Landline |
| 203-375 | Frontier Communications | Landline |
| 203-376 | Verizon Wireless | Wireless |
| 203-377 | Frontier Communications | Landline |
| 203-378 | Frontier Communications | Landline |
| 203-379 | Frontier Communications | Landline |
| 203-380 | Frontier Communications | Landline |
| 203-381 | Frontier Communications | Landline |
| 203-382 | Frontier Communications | Landline |
| 203-383 | Frontier Communications | Landline |
| 203-384 | Frontier Communications | Landline |
| 203-385 | Frontier Communications | Landline |
| 203-386 | Frontier Communications | Landline |
| 203-387 | Frontier Communications | Landline |
| 203-388 | Verizon Business (MCImetro) | Landline |
| 203-389 | Frontier Communications | Landline |
| 203-390 | AT&T (Teleport Communications) | Landline |
| 203-391 | Verizon Business (MCImetro) | Landline |
| 203-392 | Frontier Communications | Landline |
| 203-393 | Frontier Communications | Landline |
| 203-394 | Frontier Communications | Landline |
| 203-395 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-396 | Frontier Communications | Landline |
| 203-397 | Frontier Communications | Landline |
| 203-398 | Spok (paging) | Landline |
| 203-399 | Verizon Business (MCImetro) | Landline |
| 203-400 | AT&T Mobility | Wireless |
| 203-401 | Frontier Communications | Landline |
| 203-402 | Frontier Communications | Landline |
| 203-403 | AT&T (Teleport Communications) | Landline |
| 203-404 | Lumen (Level 3) | VoIP |
| 203-405 | Windstream (Paetec) | Landline |
| 203-406 | Frontier Communications | Landline |
| 203-407 | Frontier Communications | Landline |
| 203-408 | Bandwidth.com | VoIP |
| 203-409 | AT&T (Teleport Communications) | Landline |
| 203-410 | T-Mobile (Omnipoint) | Landline |
| 203-412 | American Messaging (paging) | Landline |
| 203-413 | Windstream (Paetec) | Landline |
| 203-414 | AT&T Mobility | Wireless |
| 203-415 | AT&T Mobility | Wireless |
| 203-416 | Frontier Communications | Landline |
| 203-417 | AT&T Mobility | Wireless |
| 203-418 | AT&T (Teleport Communications) | Landline |
| 203-419 | Frontier Communications | Landline |
| 203-420 | Frontier Communications | Landline |
| 203-421 | Frontier Communications | Landline |
| 203-422 | Verizon New York | Landline |
| 203-423 | AT&T (Teleport Communications) | Landline |
| 203-424 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-425 | Frontier Communications | Landline |
| 203-426 | Frontier Communications | Landline |
| 203-427 | Verizon Business (MCImetro) | Landline |
| 203-428 | Verizon Business (MCImetro) | Landline |
| 203-429 | Verizon Business (MCImetro) | Landline |
| 203-430 | AT&T Mobility | Wireless |
| 203-431 | Frontier Communications | Landline |
| 203-432 | Bandwidth.com | VoIP |
| 203-433 | Comcast (Xfinity Voice) | VoIP |
| 203-434 | T-Mobile (Omnipoint) | Landline |
| 203-435 | T-Mobile (Omnipoint) | Landline |
| 203-436 | Frontier Communications | Landline |
| 203-437 | Verizon Business (MCImetro) | Landline |
| 203-438 | Frontier Communications | Landline |
| 203-439 | Comcast (Xfinity Voice) | VoIP |
| 203-440 | Comcast (Xfinity Voice) | VoIP |
| 203-441 | AT&T (Teleport Communications) | Landline |
| 203-442 | AT&T (Teleport Communications) | Landline |
| 203-443 | Verizon Business (MCImetro) | Landline |
| 203-444 | AT&T Mobility | Wireless |
| 203-445 | Frontier Communications | Landline |
| 203-446 | AT&T (Teleport Communications) | Landline |
| 203-447 | AT&T (Teleport Communications) | Landline |
| 203-448 | Verizon Business (MCImetro) | Landline |
| 203-449 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-450 | Verizon Wireless | Wireless |
| 203-451 | AT&T Mobility | Wireless |
| 203-452 | Frontier Communications | Landline |
| 203-453 | Frontier Communications | Landline |
| 203-454 | Frontier Communications | Landline |
| 203-455 | Verizon Business (MCImetro) | Landline |
| 203-456 | Verizon Wireless | Wireless |
| 203-457 | Frontier Communications | Landline |
| 203-458 | Frontier Communications | Landline |
| 203-459 | Frontier Communications | Landline |
| 203-460 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-461 | Frontier Communications | Landline |
| 203-462 | Frontier Communications | Landline |
| 203-463 | AT&T (Teleport Communications) | Landline |
| 203-464 | Verizon Wireless | Wireless |
| 203-465 | Frontier Communications | Landline |
| 203-466 | Frontier Communications | Landline |
| 203-467 | Frontier Communications | Landline |
| 203-468 | Frontier Communications | Landline |
| 203-469 | Frontier Communications | Landline |
| 203-470 | Verizon Wireless | Wireless |
| 203-471 | Frontier Communications | Landline |
| 203-472 | Frontier Communications | Landline |
| 203-473 | Frontier Communications | Landline |
| 203-474 | Frontier Communications | Landline |
| 203-476 | Frontier Communications | Landline |
| 203-477 | Spok (paging) | Landline |
| 203-478 | Frontier Communications | Landline |
| 203-479 | Frontier Communications | Landline |
| 203-480 | Verizon Business (MCImetro) | Landline |
| 203-481 | Frontier Communications | Landline |
| 203-482 | AT&T Mobility | Wireless |
| 203-483 | Frontier Communications | Landline |
| 203-484 | Frontier Communications | Landline |
| 203-485 | Optimum (Lightpath) | VoIP |
| 203-486 | Frontier Communications | Landline |
| 203-487 | Lumen (Level 3) | VoIP |
| 203-488 | Frontier Communications | Landline |
| 203-489 | Optimum (Lightpath) | VoIP |
| 203-490 | AT&T (Teleport Communications) | Landline |
| 203-491 | Bandwidth.com | VoIP |
| 203-492 | Frontier Communications | Landline |
| 203-493 | Lumen (Level 3) | VoIP |
| 203-494 | Verizon Wireless | Wireless |
| 203-495 | Frontier Communications | Landline |
| 203-496 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-497 | Frontier Communications | Landline |
| 203-498 | Frontier Communications | Landline |
| 203-499 | Frontier Communications | Landline |
| 203-500 | AT&T Mobility | Wireless |
| 203-501 | Verizon Wireless | Wireless |
| 203-502 | Frontier Communications | Landline |
| 203-503 | Frontier Communications | Landline |
| 203-504 | Windstream (Paetec) | Landline |
| 203-505 | Verizon Wireless | Wireless |
| 203-506 | AT&T Mobility | Wireless |
| 203-507 | T-Mobile (Omnipoint) | Landline |
| 203-508 | Windstream (Paetec) | Landline |
| 203-509 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-510 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-512 | T-Mobile (Omnipoint) | Landline |
| 203-513 | AT&T Local | Landline |
| 203-514 | AT&T (Teleport Communications) | Landline |
| 203-515 | T-Mobile (Omnipoint) | Landline |
| 203-516 | Lumen (Level 3) | VoIP |
| 203-517 | Lumen (Level 3) | VoIP |
| 203-518 | AT&T Mobility | Wireless |
| 203-519 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-520 | Verizon Wireless | Wireless |
| 203-521 | Verizon Wireless | Wireless |
| 203-522 | AT&T Mobility | Wireless |
| 203-523 | AT&T (Teleport Communications) | Landline |
| 203-524 | AT&T Mobility | Wireless |
| 203-525 | AT&T Mobility | Wireless |
| 203-526 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-527 | Frontier Communications | Landline |
| 203-528 | Lumen (Level 3) | VoIP |
| 203-529 | AT&T Local | Landline |
| 203-530 | Verizon Wireless | Wireless |
| 203-531 | Verizon New York | Landline |
| 203-532 | Verizon New York | Landline |
| 203-533 | Lumen (Level 3) | VoIP |
| 203-534 | Frontier Communications | Landline |
| 203-535 | Comcast (Xfinity Voice) | VoIP |
| 203-536 | Verizon Wireless | Wireless |
| 203-537 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-538 | Windstream (Paetec) | Landline |
| 203-539 | Frontier Communications | Landline |
| 203-540 | AT&T Mobility | Wireless |
| 203-541 | Frontier Communications | Landline |
| 203-542 | AT&T Local | Landline |
| 203-543 | T-Mobile (Omnipoint) | Landline |
| 203-544 | Frontier Communications | Landline |
| 203-545 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-546 | AT&T (Teleport Communications) | Landline |
| 203-547 | Onvoy (Sinch) | VoIP |
| 203-548 | Lumen (Level 3) | VoIP |
| 203-549 | Windstream (Paetec) | Landline |
| 203-550 | T-Mobile (Omnipoint) | Landline |
| 203-551 | AT&T (Teleport Communications) | Landline |
| 203-552 | Verizon New York | Landline |
| 203-553 | Frontier Communications | Landline |
| 203-554 | AT&T Mobility | Wireless |
| 203-556 | AT&T Mobility | Wireless |
| 203-557 | Optimum (Lightpath) | VoIP |
| 203-558 | AT&T Mobility | Wireless |
| 203-559 | AT&T (Teleport Communications) | Landline |
| 203-560 | AT&T Mobility | Wireless |
| 203-561 | Verizon Wireless | Wireless |
| 203-562 | Frontier Communications | Landline |
| 203-563 | Frontier Communications | Landline |
| 203-564 | AT&T Local | Landline |
| 203-565 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-566 | Verizon Business (MCImetro) | Landline |
| 203-567 | Windstream (Paetec) | Landline |
| 203-568 | Windstream (Paetec) | Landline |
| 203-569 | Optimum (Lightpath) | VoIP |
| 203-570 | T-Mobile (Omnipoint) | Landline |
| 203-571 | AT&T Local | Landline |
| 203-572 | T-Mobile (Omnipoint) | Landline |
| 203-573 | Frontier Communications | Landline |
| 203-574 | Frontier Communications | Landline |
| 203-575 | Frontier Communications | Landline |
| 203-576 | Frontier Communications | Landline |
| 203-577 | Frontier Communications | Landline |
| 203-578 | Frontier Communications | Landline |
| 203-579 | Frontier Communications | Landline |
| 203-580 | Peerless Network | VoIP |
| 203-581 | Frontier Communications | Landline |
| 203-582 | Frontier Communications | Landline |
| 203-583 | Lumen (Level 3) | VoIP |
| 203-584 | Verizon Wireless | Wireless |
| 203-585 | Frontier Communications | Landline |
| 203-586 | AT&T (Teleport Communications) | Landline |
| 203-587 | Csc Voice | Landline |
| 203-588 | Optimum (Lightpath) | VoIP |
| 203-589 | T-Mobile (Omnipoint) | Landline |
| 203-590 | Lumen (Level 3) | VoIP |
| 203-591 | Frontier Communications | Landline |
| 203-592 | AT&T Mobility | Wireless |
| 203-593 | Spok (paging) | Landline |
| 203-594 | Optimum (Lightpath) | VoIP |
| 203-595 | Frontier Communications | Landline |
| 203-596 | Frontier Communications | Landline |
| 203-597 | Frontier Communications | Landline |
| 203-598 | Frontier Communications | Landline |
| 203-599 | Lumen (Level 3) | VoIP |
| 203-600 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-601 | AT&T (Teleport Communications) | Landline |
| 203-602 | Frontier Communications | Landline |
| 203-603 | Frontier Communications | Landline |
| 203-604 | Lumen (Level 3) | VoIP |
| 203-605 | Verizon Wireless | Wireless |
| 203-606 | T-Mobile (Omnipoint) | Landline |
| 203-607 | Verizon Business (MCImetro) | Landline |
| 203-608 | Windstream (Paetec) | Landline |
| 203-609 | Frontier Communications | Landline |
| 203-610 | Windstream (Paetec) | Landline |
| 203-612 | Lumen (Level 3) | VoIP |
| 203-613 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-614 | Frontier Communications | Landline |
| 203-615 | Frontier Communications | Landline |
| 203-616 | Lumen (Level 3) | VoIP |
| 203-617 | T-Mobile (Omnipoint) | Landline |
| 203-618 | Verizon New York | Landline |
| 203-619 | Frontier Communications | Landline |
| 203-620 | Verizon Business (MCImetro) | Landline |
| 203-621 | Windstream (Paetec) | Landline |
| 203-622 | Verizon New York | Landline |
| 203-623 | Verizon Wireless | Wireless |
| 203-624 | Frontier Communications | Landline |
| 203-625 | Verizon New York | Landline |
| 203-626 | AT&T Local | Landline |
| 203-627 | T-Mobile (Omnipoint) | Landline |
| 203-628 | Optimum (Lightpath) | VoIP |
| 203-629 | Verizon New York | Landline |
| 203-630 | Frontier Communications | Landline |
| 203-631 | AT&T Mobility | Wireless |
| 203-632 | Windstream (Paetec) | Landline |
| 203-633 | Lumen (Level 3) | VoIP |
| 203-634 | Frontier Communications | Landline |
| 203-635 | Lumen (Level 3) | VoIP |
| 203-636 | Verizon Business (MCImetro) | Landline |
| 203-637 | Frontier Communications | Landline |
| 203-638 | Windstream (Paetec) | Landline |
| 203-639 | Frontier Communications | Landline |
| 203-640 | AT&T Mobility | Wireless |
| 203-641 | Verizon Wireless | Wireless |
| 203-642 | Verizon Business (MCImetro) | Landline |
| 203-643 | Windstream (Paetec) | Landline |
| 203-644 | Verizon Wireless | Wireless |
| 203-645 | AT&T Mobility | Wireless |
| 203-646 | Onvoy (Sinch) | VoIP |
| 203-647 | Windstream (Paetec) | Landline |
| 203-648 | Lumen (Level 3) | VoIP |
| 203-649 | Windstream (Paetec) | Landline |
| 203-650 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-651 | Windstream (Paetec) | Landline |
| 203-652 | Windstream (Paetec) | Landline |
| 203-653 | Windstream (Paetec) | Landline |
| 203-654 | Frontier Communications | Landline |
| 203-655 | Frontier Communications | Landline |
| 203-656 | Frontier Communications | Landline |
| 203-657 | American Messaging (paging) | Landline |
| 203-658 | AT&T (Teleport Communications) | Landline |
| 203-659 | Windstream (Paetec) | Landline |
| 203-660 | Onvoy (Sinch) | VoIP |
| 203-661 | Verizon New York | Landline |
| 203-662 | Frontier Communications | Landline |
| 203-663 | Windstream (Paetec) | Landline |
| 203-664 | Optimum (Lightpath) | VoIP |
| 203-665 | Windstream (Paetec) | Landline |
| 203-666 | Lumen (Level 3) | VoIP |
| 203-667 | T-Mobile (Omnipoint) | Landline |
| 203-668 | T-Mobile (Omnipoint) | Landline |
| 203-669 | Lumen (Level 3) | VoIP |
| 203-670 | T-Mobile (Omnipoint) | Landline |
| 203-671 | Verizon Wireless | Wireless |
| 203-672 | Windstream (Paetec) | Landline |
| 203-673 | AT&T Local | Landline |
| 203-674 | Frontier Communications | Landline |
| 203-675 | T-Mobile (Omnipoint) | Landline |
| 203-676 | T-Mobile (Omnipoint) | Landline |
| 203-677 | Frontier Communications | Landline |
| 203-678 | Windstream (Paetec) | Landline |
| 203-679 | Frontier Communications | Landline |
| 203-680 | Frontier Communications | Landline |
| 203-681 | Verizon New York | Landline |
| 203-682 | Windstream (Paetec) | Landline |
| 203-683 | Windstream (Paetec) | Landline |
| 203-684 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-685 | T-Mobile (Omnipoint) | Landline |
| 203-686 | Frontier Communications | Landline |
| 203-687 | Lumen (Level 3) | VoIP |
| 203-688 | Frontier Communications | Landline |
| 203-689 | AT&T Local | Landline |
| 203-690 | T-Mobile (Omnipoint) | Landline |
| 203-691 | Frontier Communications | Landline |
| 203-692 | Lumen (Level 3) | VoIP |
| 203-693 | Optimum (Lightpath) | VoIP |
| 203-694 | Frontier Communications | Landline |
| 203-695 | Frontier Communications | Landline |
| 203-696 | Frontier Communications | Landline |
| 203-697 | Frontier Communications | Landline |
| 203-698 | Frontier Communications | Landline |
| 203-699 | Frontier Communications | Landline |
| 203-701 | AT&T Local | Landline |
| 203-702 | Windstream (Paetec) | Landline |
| 203-703 | Frontier Communications | Landline |
| 203-704 | Lumen (Level 3) | VoIP |
| 203-705 | Verizon Business (MCImetro) | Landline |
| 203-706 | Windstream (Paetec) | Landline |
| 203-707 | Verizon Wireless | Wireless |
| 203-708 | Frontier Communications | Landline |
| 203-709 | Frontier Communications | Landline |
| 203-710 | AT&T Mobility | Wireless |
| 203-712 | Lumen (Level 3) | VoIP |
| 203-713 | Onvoy (Sinch) | VoIP |
| 203-714 | Onvoy Spectrum (Sinch) | VoIP |
| 203-715 | T-Mobile (Omnipoint) | Landline |
| 203-716 | Lumen (Level 3) | VoIP |
| 203-717 | Csc Voice | Landline |
| 203-718 | Lumen (Level 3) | VoIP |
| 203-719 | Verizon Business (MCImetro) | Landline |
| 203-720 | Frontier Communications | Landline |
| 203-721 | Verizon Wireless | Wireless |
| 203-722 | AT&T Mobility | Wireless |
| 203-723 | Frontier Communications | Landline |
| 203-724 | Windstream (Paetec) | Landline |
| 203-725 | Comcast (Xfinity Voice) | VoIP |
| 203-726 | Verizon Wireless | Wireless |
| 203-727 | T-Mobile (Omnipoint) | Landline |
| 203-728 | Frontier Communications | Landline |
| 203-729 | Frontier Communications | Landline |
| 203-730 | Frontier Communications | Landline |
| 203-731 | Frontier Communications | Landline |
| 203-732 | Frontier Communications | Landline |
| 203-733 | Verizon Wireless | Wireless |
| 203-734 | Frontier Communications | Landline |
| 203-735 | Frontier Communications | Landline |
| 203-736 | Frontier Communications | Landline |
| 203-737 | Frontier Communications | Landline |
| 203-738 | Windstream (Paetec) | Landline |
| 203-739 | Frontier Communications | Landline |
| 203-740 | Frontier Communications | Landline |
| 203-741 | Frontier Communications | Landline |
| 203-742 | Verizon Business (MCImetro) | Landline |
| 203-743 | Frontier Communications | Landline |
| 203-744 | Frontier Communications | Landline |
| 203-745 | Frontier Communications | Landline |
| 203-746 | Frontier Communications | Landline |
| 203-747 | AT&T (Teleport Communications) | Landline |
| 203-748 | Frontier Communications | Landline |
| 203-749 | Frontier Communications | Landline |
| 203-750 | Frontier Communications | Landline |
| 203-751 | Frontier Communications | Landline |
| 203-752 | Frontier Communications | Landline |
| 203-753 | Frontier Communications | Landline |
| 203-754 | Frontier Communications | Landline |
| 203-755 | Frontier Communications | Landline |
| 203-756 | Frontier Communications | Landline |
| 203-757 | Frontier Communications | Landline |
| 203-758 | Frontier Communications | Landline |
| 203-759 | Frontier Communications | Landline |
| 203-760 | Peerless Network | VoIP |
| 203-761 | Frontier Communications | Landline |
| 203-762 | Frontier Communications | Landline |
| 203-763 | Lumen (Level 3) | VoIP |
| 203-764 | Frontier Communications | Landline |
| 203-765 | Frontier Communications | Landline |
| 203-766 | American Messaging (paging) | Landline |
| 203-767 | Verizon Wireless | Wireless |
| 203-768 | T-Mobile (Omnipoint) | Landline |
| 203-769 | Verizon New York | Landline |
| 203-770 | AT&T Mobility | Wireless |
| 203-771 | Frontier Communications | Landline |
| 203-772 | Frontier Communications | Landline |
| 203-773 | Frontier Communications | Landline |
| 203-774 | Windstream (Paetec) | Landline |
| 203-775 | Frontier Communications | Landline |
| 203-776 | Frontier Communications | Landline |
| 203-777 | Frontier Communications | Landline |
| 203-778 | Frontier Communications | Landline |
| 203-779 | Windstream (Paetec) | Landline |
| 203-780 | Peerless Network | VoIP |
| 203-781 | Frontier Communications | Landline |
| 203-782 | Frontier Communications | Landline |
| 203-783 | Frontier Communications | Landline |
| 203-784 | Frontier Communications | Landline |
| 203-785 | Frontier Communications | Landline |
| 203-786 | Frontier Communications | Landline |
| 203-787 | Frontier Communications | Landline |
| 203-788 | AT&T Mobility | Wireless |
| 203-789 | Frontier Communications | Landline |
| 203-790 | Frontier Communications | Landline |
| 203-791 | Frontier Communications | Landline |
| 203-792 | Frontier Communications | Landline |
| 203-793 | Lumen (Level 3) | VoIP |
| 203-794 | Frontier Communications | Landline |
| 203-795 | Frontier Communications | Landline |
| 203-796 | Frontier Communications | Landline |
| 203-797 | Frontier Communications | Landline |
| 203-798 | Frontier Communications | Landline |
| 203-799 | Frontier Communications | Landline |
| 203-800 | T-Mobile (Omnipoint) | Landline |
| 203-801 | Frontier Communications | Landline |
| 203-802 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-803 | Verizon Wireless | Wireless |
| 203-804 | AT&T Mobility | Wireless |
| 203-805 | AT&T (Teleport Communications) | Landline |
| 203-806 | AT&T (Teleport Communications) | Landline |
| 203-807 | AT&T Mobility | Wireless |
| 203-808 | T-Mobile (Omnipoint) | Landline |
| 203-809 | T-Mobile (Omnipoint) | Landline |
| 203-810 | Optimum (Lightpath) | VoIP |
| 203-812 | Frontier Communications | Landline |
| 203-813 | AT&T (Teleport Communications) | Landline |
| 203-814 | Verizon Wireless | Wireless |
| 203-815 | Verizon Wireless | Wireless |
| 203-816 | Lumen (Level 3) | VoIP |
| 203-817 | Optimum (Lightpath) | VoIP |
| 203-818 | Verizon Business (MCImetro) | Landline |
| 203-819 | AT&T Mobility | Wireless |
| 203-820 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-821 | Frontier Communications | Landline |
| 203-822 | AT&T Local | Landline |
| 203-823 | Comcast (Xfinity Voice) | VoIP |
| 203-824 | AT&T Mobility | Wireless |
| 203-825 | Frontier Communications | Landline |
| 203-826 | Frontier Communications | Landline |
| 203-827 | Verizon Business (MCImetro) | Landline |
| 203-828 | Lumen (Level 3) | VoIP |
| 203-829 | T-Mobile (Omnipoint) | Landline |
| 203-830 | Frontier Communications | Landline |
| 203-831 | Frontier Communications | Landline |
| 203-832 | AT&T Mobility | Wireless |
| 203-833 | Verizon Wireless | Wireless |
| 203-834 | Frontier Communications | Landline |
| 203-835 | Spok (paging) | Landline |
| 203-836 | Verizon Wireless | Wireless |
| 203-837 | Frontier Communications | Landline |
| 203-838 | Frontier Communications | Landline |
| 203-839 | Spok (paging) | Landline |
| 203-840 | Frontier Communications | Landline |
| 203-841 | Windstream (Paetec) | Landline |
| 203-842 | Lumen (Level 3) | VoIP |
| 203-843 | AT&T Mobility | Wireless |
| 203-844 | Verizon Business (MCImetro) | Landline |
| 203-845 | Frontier Communications | Landline |
| 203-846 | Frontier Communications | Landline |
| 203-847 | Frontier Communications | Landline |
| 203-848 | Windstream (Paetec) | Landline |
| 203-849 | Frontier Communications | Landline |
| 203-850 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-851 | Frontier Communications | Landline |
| 203-852 | Frontier Communications | Landline |
| 203-853 | Frontier Communications | Landline |
| 203-854 | Frontier Communications | Landline |
| 203-855 | Frontier Communications | Landline |
| 203-856 | Verizon Wireless | Wireless |
| 203-857 | Frontier Communications | Landline |
| 203-858 | Verizon Wireless | Wireless |
| 203-859 | Verizon Business (MCImetro) | Landline |
| 203-861 | Verizon New York | Landline |
| 203-862 | Verizon New York | Landline |
| 203-863 | Verizon New York | Landline |
| 203-864 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-865 | Frontier Communications | Landline |
| 203-866 | Frontier Communications | Landline |
| 203-867 | Frontier Communications | Landline |
| 203-868 | AT&T Local | Landline |
| 203-869 | Verizon New York | Landline |
| 203-870 | Optimum (Lightpath) | VoIP |
| 203-871 | AT&T (Teleport Communications) | Landline |
| 203-872 | Bandwidth.com | VoIP |
| 203-873 | AT&T Mobility | Wireless |
| 203-874 | Frontier Communications | Landline |
| 203-875 | AT&T Local | Landline |
| 203-876 | Frontier Communications | Landline |
| 203-877 | Frontier Communications | Landline |
| 203-878 | Frontier Communications | Landline |
| 203-879 | Frontier Communications | Landline |
| 203-880 | AT&T (Teleport Communications) | Landline |
| 203-881 | Frontier Communications | Landline |
| 203-882 | Frontier Communications | Landline |
| 203-883 | Lumen (Level 3) | VoIP |
| 203-884 | Onvoy (Sinch) | VoIP |
| 203-885 | Verizon Wireless | Wireless |
| 203-886 | Windstream (Paetec) | Landline |
| 203-887 | T-Mobile (Omnipoint) | Landline |
| 203-888 | Frontier Communications | Landline |
| 203-889 | Lumen (Level 3) | VoIP |
| 203-890 | Frontier Communications | Landline |
| 203-891 | Frontier Communications | Landline |
| 203-892 | T-Mobile (Omnipoint) | Landline |
| 203-893 | Verizon Wireless | Wireless |
| 203-894 | Frontier Communications | Landline |
| 203-895 | AT&T Mobility | Wireless |
| 203-896 | Peerless Network | VoIP |
| 203-897 | Verizon Business (MCImetro) | Landline |
| 203-898 | Verizon Business (MCImetro) | Landline |
| 203-899 | Frontier Communications | Landline |
| 203-900 | Csc Voice | Landline |
| 203-901 | T-Mobile (Omnipoint) | Landline |
| 203-902 | Onvoy (Sinch) | VoIP |
| 203-903 | Lumen (Level 3) | VoIP |
| 203-904 | T-Mobile (Omnipoint) | Landline |
| 203-905 | AT&T (Teleport Communications) | Landline |
| 203-906 | Verizon Wireless | Wireless |
| 203-907 | Windstream (Paetec) | Landline |
| 203-908 | T-Mobile (Omnipoint) | Landline |
| 203-909 | Verizon Wireless | Wireless |
| 203-910 | Verizon Wireless | Wireless |
| 203-912 | Verizon Wireless | Wireless |
| 203-913 | Verizon Wireless | Wireless |
| 203-914 | Csc Voice | Landline |
| 203-915 | Verizon Wireless | Wireless |
| 203-916 | Lumen (Level 3) | VoIP |
| 203-917 | Verizon Wireless | Wireless |
| 203-918 | AT&T Mobility | Wireless |
| 203-919 | T-Mobile (Omnipoint) | Landline |
| 203-920 | Verizon Business (MCImetro) | Landline |
| 203-921 | Frontier Communications | Landline |
| 203-922 | Frontier Communications | Landline |
| 203-923 | Verizon Business (MCImetro) | Landline |
| 203-924 | Frontier Communications | Landline |
| 203-925 | Frontier Communications | Landline |
| 203-926 | Frontier Communications | Landline |
| 203-927 | Verizon Wireless | Wireless |
| 203-928 | Frontier Communications | Landline |
| 203-929 | Frontier Communications | Landline |
| 203-930 | Lumen (Level 3) | VoIP |
| 203-931 | Frontier Communications | Landline |
| 203-932 | Frontier Communications | Landline |
| 203-933 | Frontier Communications | Landline |
| 203-934 | Frontier Communications | Landline |
| 203-935 | Lumen (Level 3) | VoIP |
| 203-936 | Frontier Communications | Landline |
| 203-937 | Frontier Communications | Landline |
| 203-938 | Frontier Communications | Landline |
| 203-939 | Csc Voice | Landline |
| 203-940 | Frontier Communications | Landline |
| 203-941 | Bandwidth.com | VoIP |
| 203-942 | T-Mobile (Omnipoint) | Landline |
| 203-943 | T-Mobile (Omnipoint) | Landline |
| 203-944 | Frontier Communications | Landline |
| 203-945 | Frontier Communications | Landline |
| 203-946 | Frontier Communications | Landline |
| 203-947 | AT&T Mobility | Wireless |
| 203-948 | T-Mobile (Omnipoint) | Landline |
| 203-949 | Frontier Communications | Landline |
| 203-951 | AT&T (Teleport Communications) | Landline |
| 203-952 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-953 | T-Mobile (Omnipoint) | Landline |
| 203-954 | Windstream (Paetec) | Landline |
| 203-955 | Verizon Business (MCImetro) | Landline |
| 203-956 | Optimum (Lightpath) | VoIP |
| 203-957 | Csc Voice | Landline |
| 203-960 | Optimum (Lightpath) | VoIP |
| 203-961 | Frontier Communications | Landline |
| 203-962 | Frontier Communications | Landline |
| 203-963 | Frontier Communications | Landline |
| 203-964 | Frontier Communications | Landline |
| 203-965 | Frontier Communications | Landline |
| 203-966 | Frontier Communications | Landline |
| 203-967 | Frontier Communications | Landline |
| 203-968 | Frontier Communications | Landline |
| 203-969 | Frontier Communications | Landline |
| 203-970 | Optimum (Lightpath) | VoIP |
| 203-971 | Optimum (Lightpath) | VoIP |
| 203-972 | Frontier Communications | Landline |
| 203-973 | Frontier Communications | Landline |
| 203-974 | AT&T (Teleport Communications) | Landline |
| 203-975 | Frontier Communications | Landline |
| 203-977 | Frontier Communications | Landline |
| 203-978 | Frontier Communications | Landline |
| 203-979 | AT&T Mobility | Wireless |
| 203-980 | Verizon Wireless | Wireless |
| 203-981 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-982 | Metro by T-Mobile (MetroPCS) | Wireless |
| 203-983 | Windstream (Paetec) | Landline |
| 203-984 | Verizon Wireless | Wireless |
| 203-985 | Frontier Communications | Landline |
| 203-986 | Verizon Business (MCImetro) | Landline |
| 203-987 | Lumen (Level 3) | VoIP |
| 203-988 | AT&T Mobility | Wireless |
| 203-989 | Lumen (Level 3) | VoIP |
| 203-990 | Verizon Business (MCImetro) | Landline |
| 203-991 | Frontier Communications | Landline |
| 203-992 | Csc Voice | Landline |
| 203-993 | Verizon Wireless | Wireless |
| 203-994 | T-Mobile (Omnipoint) | Landline |
| 203-995 | Verizon Business (MCImetro) | Landline |
| 203-996 | T-Mobile (Omnipoint) | Landline |
| 203-997 | T-Mobile (Omnipoint) | Landline |
| 203-998 | Lumen (Level 3) | VoIP |
| 203-999 | T-Mobile (Omnipoint) | Landline |
Line type reflects the registry assignment; ported numbers can differ. Unknown 203 number calling? ActiveArmor® screens it before you ever look it up.
Cities & Communities in and around Area Code 203
Communities the 203 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 |
|---|---|---|
| Ansonia | 06401, 06418, 06483 | Internet Air |
| Bethel | 06801, 06810, 06896 | Internet Air |
| Bridgeport | 06608, 06606, 06607 | Internet Air |
| Bristol | 06010, 06786, 06062 | Internet Air |
| Cos Cob | 06807, 06878, 06830 | Internet Air |
| Danbury | 06811, 06810, 06801 | Internet Air |
| Derby | 06418, 06401, 06484 | Internet Air |
| East Haven | 06512, 06513, 06510 | Internet Air |
| Greenwich | 06830, 06878, 06807 | Internet Air |
| Meriden | 06450, 06451, 06455 | Internet Air |
| Middletown | 06459, 06457, 06481 | Internet Air |
| Naugatuck | 06770, 06403, 06706 | Internet Air |
| New Canaan | 06840, 06850, 06907 | Internet Air |
| New Haven | 06510, 06511, 06519 | Internet Air |
| New Milford | 06776, 06752, 06784 | Internet Air |
| North Haven | 06473, 06517, 06513 | Internet Air |
| Northford | 06472, 06473, 06471 | Internet Air |
| Norwalk | 06854, 06853, 06855 | Internet Air |
| Old Greenwich | 06870, 06878, 06901 | Internet Air |
| Orange | 06477, 06516, 06461 | Internet Air |
| Ridgefield | 10590, 06877, 06897 | Internet Air |
| Sandy Hook | 06482, 06470, 06488 | Internet Air |
| Shelton | 06484, 06418, 06611 | Internet Air |
| Southport | 06890, 06824, 06880 | Internet Air |
| Stamford | 06905, 06906, 06902 | Internet Air |
| Waterbury | 06702, 06710, 06708 | Internet Air |
| West Haven | 06516, 06519, 06477 | 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.
203 Area Code Map
Area code 203 serves Bridgeport and nearby communities in CT.
↓ Printable PDF
Open the printable 203 map (PDF) · All Connecticut area codes · Home internet in Bridgeport
Counties Covered by the 203 Area Code
Counties are served in whole or in part; population is U.S. Census Bureau ACS 2023. The 203 also reaches parts of Middlesex County.
The 203, explained
Area Code 203: More Than a Number in Bridgeport
In Bridgeport, the 203 is more than digits on a caller ID. It’s one of the original area codes of 1947, and it has meant Bridgeport and surrounding communities ever since — 784 carrier prefixes keep its lines busy today, and an established 203 number still says you’ve been here a while.
The map tells its own story: Bridgeport and surrounding communities, with 475 sharing the same streets today. Several codes, one local calling area, no long-distance between any of them — only the 203 came first.
Keeping a 203 matters here. An existing 203 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 475 instead — one more reason locals hold on to theirs.
Need a new local number? Shop plans Keep your 203: bring it to AT&TInternet, wireless & stores in the 203
AT&T Home Internet in Area Code 203
AT&T home internet serves communities across area code 203, 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 203? AT&T Business Internet is available at many addresses.
Fiber install day in the 203Check your address ›
Moving to Area Code 203?
Set up home internet in area code 203 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 203 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 203
AT&T’s 5G network covers most of area code 203. ActiveArmor® spam blocking is included with every unlimited plan, your 203 number stays yours, and great cell phone deals in Bridgeport are a tap away.
5G across the 203ActiveArmor® includedKeep your 203 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 203 number? Ask when you activate a line: the 203 shares its territory with 475, so new lines may draw one of those codes, and porting an existing 203 number keeps it yours.
Stay connected across BridgeportShop wireless plans ›
AT&T Stores in Area Code 203
Looking for cell phone stores in area code 203? These stores answer on 203 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 BridgeportFind your store ›
All AT&T Stores with 203 Numbers
Every store below answers on a 203 number. Tap any number to call.
12 AT&T stores with 203 numbers
International Calling from Area Code 203
Calling abroad from area code 203? 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 203 calls most:JamaicaIndiaDominican RepublicEcuadorBrazil
Top places of birth among foreign-born residents of the 203’s counties, U.S. Census Bureau ACS 2023.
Calling abroad from a 203 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.
Bridgeport calls the worldSee international plans ›
203 Area Code Quick Facts & Dialing
StateConnecticut
Time zoneEastern
Overlays475share this territory
Established1947original code
Dialing10 digitsrequired
Toll-free?Nogeographic code
Population3.07Mcounties served, Census 2023
Largest cityBridgeport+26 more ›
How to dial a 203 number
| Scenario | Format | Example |
|---|---|---|
| Local call (within the region) | 203 + 7-digit number | (203) 555-0100 |
| Long distance (within the U.S.) | 1 + 203 + 7-digit number | 1 (203) 555-0100 |
| Calling 203 from another country | +1 203 + 7-digit number | +1 203 555 0100 |
| From a mobile phone | (203) + 7-digit number | (203) 555-0100 |
A Short History of Area Code 203
One of the original area codes of 1947, the 203 has served Bridgeport and surrounding communities from the beginning.
Area Code 203 vs the related codes
| Code | Added | Type | Where it works |
|---|---|---|---|
| 203 | 1947 | Original | Bridgeport and surrounding communities |
| 860 | 1995 | Split | Territory carved from the 203 |
| 475 | 2009 | Overlay | Same territory as the 203 |
Same rates, same local dialing: a number from any code in the region works exactly like a 203.
Nearby & Related Area Codes
Browse area codes by state: Connecticut (4) · California (41) · Texas (29) · Florida (23) · all 50 states ›
Area Code 203 FAQ
What area code is 203?
203 is the area code for Bridgeport, Connecticut and the surrounding communities. It appears at the front of every local 10-digit phone number in the area.
Where is area code 203?
Area code 203 serves Bridgeport, Connecticut and nearby communities including Beacon Falls, Bethany, Bethel. The full city list is in the cities table above.
Why did I get a text message from a 203 number?
The most common 203 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 203?
A 203 number usually means Bridgeport 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 203?
Eastern time. The live local time is shown at the top of this page.
Why am I getting calls from 203 numbers?
203 is an active, legitimate Connecticut 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 203 prefixes are drawing complaints right now.
Is 203 a toll-free number?
No. 203 is a geographic area code tied to Bridgeport, Connecticut. Toll-free calls come from 800, 833, 844, 855, 866, 877 and 888 numbers.
What’s the difference between 203 and 475?
475 is an overlay of 203: both cover the same Bridgeport area, and calls between them are local. New lines may get either code.
Which cities use area code 203?
The largest communities include Ansonia, Bethel, Bridgeport, Bristol, Cos Cob. The full list is in the cities table above.
Does AT&T offer service in the 203?
Yes: home internet, wireless and retail stores across the 203. Availability is checked address by address.
Can I still get a 203 number?
Yes. Carriers in Bridgeport and across the 203 still issue 203 numbers on new lines, and you can port an existing 203 number to any carrier. Newer lines in the same area may also receive numbers from an overlay code.
Can I keep my 203 number if I move?
Yes. Phone numbers are portable: your 203 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.
