Who Called Me from Area Code 720?
Quick answerA 720 call usually comes from Denver 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 720 prefixes, right on this page.
- Curious who issued a number? Every 720 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 720 prefixes this month
PrefixReported patternReport volume
(720) 861-XXXXRobocall-heavy
(720) 721-XXXXRobocall-heavy
(720) 801-XXXXRobocall-heavy
(720) 405-XXXXRobocall-heavy
(720) 745-XXXXRobocall-heavy
402 unwanted-call reports naming 720 numbers in FTC Do Not Call complaint data, July 2–17, 2026. Consumer-reported and unverified.
Block spam calls in the 720, 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 720 a Scam?
No. 720 is a legitimate Denver area code.
It’s added to the 303 region in 1998 and serves Denver 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 303 region in 1998; 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 720 numbers
The most common area code 720 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 720
Caller ID is easy to forge. Spoofing fakes the number a call displays. The real owner of that 720 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 720 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 720 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.
720 Area Code Prefix & Carrier Lookup
The three digits after the area code identify the carrier a number was issued to. All 785 assigned 720 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 720 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 |
|---|---|---|
| 720-200 | Qwest Corporation | Landline |
| 720-201 | AT&T Mobility | Wireless |
| 720-202 | Verizon Wireless | Wireless |
| 720-203 | T-Mobile | Wireless |
| 720-204 | Lumen (Level 3) | VoIP |
| 720-205 | T-Mobile | Wireless |
| 720-206 | Verizon Business (MCImetro) | Landline |
| 720-207 | Verizon Business (MCImetro) | Landline |
| 720-208 | Verizon Business (MCImetro) | Landline |
| 720-209 | T-Mobile | Wireless |
| 720-210 | Verizon Business (MCImetro) | Landline |
| 720-212 | Verizon Business (MCImetro) | Landline |
| 720-213 | Windstream (Paetec) | Landline |
| 720-214 | Windstream (Paetec) | Landline |
| 720-215 | Verizon Wireless | Wireless |
| 720-216 | AT&T (Teleport Communications) | Landline |
| 720-217 | T-Mobile | Wireless |
| 720-218 | T-Mobile | Wireless |
| 720-219 | Verizon Wireless | Wireless |
| 720-220 | T-Mobile | Wireless |
| 720-221 | Verizon Business (MCImetro) | Landline |
| 720-222 | Verizon Business (MCImetro) | Landline |
| 720-223 | Verizon Business (MCImetro) | Landline |
| 720-224 | Verizon Business (MCImetro) | Landline |
| 720-225 | Verizon Business (MCImetro) | Landline |
| 720-226 | Verizon Business (MCImetro) | Landline |
| 720-227 | Verizon Business (MCImetro) | Landline |
| 720-228 | Verizon Business (MCImetro) | Landline |
| 720-229 | Verizon Business (MCImetro) | Landline |
| 720-230 | Xo Colorado | Landline |
| 720-231 | T-Mobile | Wireless |
| 720-232 | T-Mobile | Wireless |
| 720-233 | T-Mobile | Wireless |
| 720-234 | T-Mobile | Wireless |
| 720-235 | T-Mobile | Wireless |
| 720-236 | T-Mobile | Wireless |
| 720-237 | AT&T Mobility | Wireless |
| 720-238 | T-Mobile | Wireless |
| 720-239 | AT&T (Teleport Communications) | Landline |
| 720-240 | Verizon Business (MCImetro) | Landline |
| 720-241 | Verizon Business (MCImetro) | Landline |
| 720-242 | Qwest Corporation | Landline |
| 720-243 | AT&T Mobility | Wireless |
| 720-244 | AT&T Mobility | Wireless |
| 720-245 | Allstream (Electric Lightwave) | Landline |
| 720-246 | Verizon Business (MCImetro) | Landline |
| 720-247 | Verizon Business (MCImetro) | Landline |
| 720-248 | Onvoy (Sinch) | VoIP |
| 720-249 | Verizon Business (MCImetro) | Landline |
| 720-250 | Verizon Business (MCImetro) | Landline |
| 720-251 | Lumen (Level 3) | VoIP |
| 720-252 | T-Mobile | Wireless |
| 720-253 | T-Mobile | Wireless |
| 720-254 | T-Mobile | Wireless |
| 720-255 | T-Mobile | Wireless |
| 720-256 | T-Mobile | Wireless |
| 720-257 | Verizon Business (MCImetro) | Landline |
| 720-258 | AT&T (Teleport Communications) | Landline |
| 720-259 | Lumen (Level 3) | VoIP |
| 720-260 | T-Mobile | Wireless |
| 720-261 | T-Mobile | Wireless |
| 720-262 | Lumen (Level 3) | VoIP |
| 720-263 | Lumen (Level 3) | VoIP |
| 720-264 | Qwest Corporation | Landline |
| 720-265 | Verizon Business (MCImetro) | Landline |
| 720-266 | Lumen (Level 3) | VoIP |
| 720-267 | Qwest Corporation | Landline |
| 720-268 | Qwest Corporation | Landline |
| 720-269 | AT&T (Teleport Communications) | Landline |
| 720-270 | T-Mobile | Wireless |
| 720-271 | T-Mobile | Wireless |
| 720-272 | AT&T Mobility | Wireless |
| 720-273 | AT&T Mobility | Wireless |
| 720-274 | Windstream (Paetec) | Landline |
| 720-275 | AT&T Mobility | Wireless |
| 720-276 | AT&T Mobility | Wireless |
| 720-277 | Lumen (Level 3) | VoIP |
| 720-278 | Lumen (Level 3) | VoIP |
| 720-279 | Lumen (Level 3) | VoIP |
| 720-280 | T-Mobile | Wireless |
| 720-281 | Verizon Wireless | Wireless |
| 720-282 | Lumen (Level 3) | VoIP |
| 720-283 | Qwest Corporation | Landline |
| 720-284 | Verizon Business (MCImetro) | Landline |
| 720-285 | Xo Colorado | Landline |
| 720-286 | AT&T (Teleport Communications) | Landline |
| 720-287 | Comcast (Xfinity Voice) | VoIP |
| 720-288 | Bandwidth.com | VoIP |
| 720-289 | AT&T Mobility | Wireless |
| 720-290 | T-Mobile | Wireless |
| 720-291 | T-Mobile | Wireless |
| 720-292 | AT&T Mobility | Wireless |
| 720-293 | Verizon Business (MCImetro) | Landline |
| 720-294 | Verizon Business (MCImetro) | Landline |
| 720-295 | Bandwidth.com | VoIP |
| 720-296 | AT&T Mobility | Wireless |
| 720-297 | AT&T Mobility | Wireless |
| 720-298 | AT&T Mobility | Wireless |
| 720-299 | T-Mobile | Wireless |
| 720-300 | T-Mobile | Wireless |
| 720-301 | T-Mobile | Wireless |
| 720-302 | AT&T (Teleport Communications) | Landline |
| 720-303 | Bandwidth.com | VoIP |
| 720-304 | Qwest Corporation | Landline |
| 720-305 | Lumen (Level 3) | VoIP |
| 720-306 | Allstream (Electric Lightwave) | Landline |
| 720-307 | AT&T Local | Landline |
| 720-308 | AT&T Mobility | Wireless |
| 720-309 | AT&T Mobility | Wireless |
| 720-310 | AT&T (Teleport Communications) | Landline |
| 720-312 | T-Mobile | Wireless |
| 720-313 | T-Mobile | Wireless |
| 720-314 | T-Mobile | Wireless |
| 720-315 | Onvoy (Sinch) | VoIP |
| 720-316 | Bandwidth.com | VoIP |
| 720-317 | T-Mobile | Wireless |
| 720-318 | T-Mobile | Wireless |
| 720-319 | T-Mobile | Wireless |
| 720-320 | AT&T Mobility | Wireless |
| 720-321 | Qwest Corporation | Landline |
| 720-322 | Qwest Corporation | Landline |
| 720-323 | T-Mobile | Wireless |
| 720-324 | Comcast (Xfinity Voice) | VoIP |
| 720-325 | T-Mobile | Wireless |
| 720-326 | AT&T Mobility | Wireless |
| 720-327 | AT&T Mobility | Wireless |
| 720-328 | Comcast (Xfinity Voice) | VoIP |
| 720-329 | AT&T Mobility | Wireless |
| 720-330 | Lumen (Level 3) | VoIP |
| 720-331 | T-Mobile | Wireless |
| 720-332 | Verizon Business (MCImetro) | Landline |
| 720-333 | T-Mobile | Wireless |
| 720-334 | T-Mobile | Wireless |
| 720-335 | T-Mobile | Wireless |
| 720-336 | Bandwidth.com | VoIP |
| 720-337 | Qwest Corporation | Landline |
| 720-338 | AT&T Mobility | Wireless |
| 720-339 | T-Mobile | Wireless |
| 720-340 | Verizon Wireless | Wireless |
| 720-341 | T-Mobile | Wireless |
| 720-342 | AT&T (Teleport Communications) | Landline |
| 720-343 | Lumen (Level 3) | VoIP |
| 720-344 | Qwest Corporation | Landline |
| 720-345 | Zippytech Incorporated | Landline |
| 720-346 | Verizon Wireless | Wireless |
| 720-347 | Lumen (Level 3) | VoIP |
| 720-348 | Qwest Corporation | Landline |
| 720-349 | AT&T (Teleport Communications) | Landline |
| 720-350 | T-Mobile | Wireless |
| 720-351 | T-Mobile | Wireless |
| 720-352 | T-Mobile | Wireless |
| 720-353 | T-Mobile | Wireless |
| 720-354 | Lumen (Level 3) | VoIP |
| 720-355 | Verizon Wireless | Wireless |
| 720-356 | AT&T (Teleport Communications) | Landline |
| 720-357 | AT&T Mobility | Wireless |
| 720-358 | Verizon Business (MCImetro) | Landline |
| 720-359 | Qwest Corporation | Landline |
| 720-360 | AT&T Mobility | Wireless |
| 720-361 | Allstream (Electric Lightwave) | Landline |
| 720-362 | Qwest Corporation | Landline |
| 720-363 | Metro by T-Mobile (MetroPCS) | Wireless |
| 720-364 | AT&T Mobility | Wireless |
| 720-365 | AT&T Mobility | Wireless |
| 720-366 | AT&T Mobility | Wireless |
| 720-367 | Verizon Business (MCImetro) | Landline |
| 720-368 | Verizon Business (MCImetro) | Landline |
| 720-369 | AT&T Mobility | Wireless |
| 720-370 | Bandwidth.com | VoIP |
| 720-371 | T-Mobile | Wireless |
| 720-372 | T-Mobile | Wireless |
| 720-373 | T-Mobile | Wireless |
| 720-374 | Qwest Corporation | Landline |
| 720-375 | AT&T Mobility | Wireless |
| 720-376 | Allstream (Electric Lightwave) | Landline |
| 720-377 | Verizon Business (MCImetro) | Landline |
| 720-378 | AT&T Mobility | Wireless |
| 720-379 | Lumen (Level 3) | VoIP |
| 720-380 | T-Mobile | Wireless |
| 720-381 | Comcast (Xfinity Voice) | VoIP |
| 720-382 | Allstream (Electric Lightwave) | Landline |
| 720-383 | Verizon Wireless | Wireless |
| 720-384 | Verizon Business (MCImetro) | Landline |
| 720-385 | Verizon Business (MCImetro) | Landline |
| 720-386 | Bandwidth.com | VoIP |
| 720-387 | Lumen (Level 3) | VoIP |
| 720-388 | Verizon Wireless | Wireless |
| 720-389 | Verizon Business (MCImetro) | Landline |
| 720-390 | Verizon Wireless | Wireless |
| 720-391 | Verizon Wireless | Wireless |
| 720-392 | Verizon Wireless | Wireless |
| 720-393 | Lumen (Level 3) | VoIP |
| 720-394 | T-Mobile | Wireless |
| 720-395 | AT&T Local | Landline |
| 720-396 | AT&T Local | Landline |
| 720-397 | AT&T Local | Landline |
| 720-398 | AT&T Mobility | Wireless |
| 720-399 | Lumen (Level 3) | VoIP |
| 720-400 | T-Mobile | Wireless |
| 720-401 | T-Mobile | Wireless |
| 720-402 | Allstream (Electric Lightwave) | Landline |
| 720-403 | Peerless Network | VoIP |
| 720-404 | AT&T Mobility | Wireless |
| 720-405 | Intrado Communications | Landline |
| 720-406 | Qwest Corporation | Landline |
| 720-407 | Onvoy (Sinch) | VoIP |
| 720-408 | Bandwidth.com | VoIP |
| 720-409 | Windstream (Paetec) | Landline |
| 720-410 | Comcast (Xfinity Voice) | VoIP |
| 720-412 | AT&T Mobility | Wireless |
| 720-413 | Verizon Wireless | Wireless |
| 720-414 | Lumen (Level 3) | VoIP |
| 720-415 | Verizon Wireless | Wireless |
| 720-416 | Metro by T-Mobile (MetroPCS) | Wireless |
| 720-417 | Allstream (Electric Lightwave) | Landline |
| 720-418 | Verizon Business (MCImetro) | Landline |
| 720-419 | T-Mobile | Wireless |
| 720-420 | Lumen (Level 3) | VoIP |
| 720-421 | T-Mobile | Wireless |
| 720-422 | AT&T Mobility | Wireless |
| 720-423 | Qwest Corporation | Landline |
| 720-424 | Qwest Corporation | Landline |
| 720-425 | Verizon Wireless | Wireless |
| 720-426 | Qwest Corporation | Landline |
| 720-427 | T-Mobile | Wireless |
| 720-428 | Onvoy (Sinch) | VoIP |
| 720-429 | AT&T Mobility | Wireless |
| 720-430 | AT&T Local | Landline |
| 720-431 | AT&T Mobility | Wireless |
| 720-432 | Bandwidth.com | VoIP |
| 720-433 | Qwest Corporation | Landline |
| 720-434 | AT&T Mobility | Wireless |
| 720-435 | AT&T Mobility | Wireless |
| 720-436 | AT&T Mobility | Wireless |
| 720-437 | Verizon Wireless | Wireless |
| 720-438 | Onvoy (Sinch) | VoIP |
| 720-439 | AT&T Mobility | Wireless |
| 720-440 | AT&T Mobility | Wireless |
| 720-441 | Bandwidth.com | VoIP |
| 720-442 | Bandwidth.com | VoIP |
| 720-443 | Bandwidth.com | VoIP |
| 720-444 | Qwest Corporation | Landline |
| 720-445 | Verizon Wireless | Wireless |
| 720-446 | Verizon Business (MCImetro) | Landline |
| 720-447 | AT&T Mobility | Wireless |
| 720-448 | AT&T Mobility | Wireless |
| 720-449 | Verizon Business (MCImetro) | Landline |
| 720-450 | Verizon Business (MCImetro) | Landline |
| 720-451 | T-Mobile | Wireless |
| 720-452 | Peerless Network | VoIP |
| 720-453 | T-Mobile | Wireless |
| 720-454 | Windstream (Paetec) | Landline |
| 720-455 | Qwest Corporation | Landline |
| 720-456 | Lumen (Level 3) | VoIP |
| 720-457 | Lumen (Level 3) | VoIP |
| 720-458 | Lumen (Level 3) | VoIP |
| 720-459 | Onvoy (Sinch) | VoIP |
| 720-460 | Allstream (Electric Lightwave) | Landline |
| 720-461 | Metro by T-Mobile (MetroPCS) | Wireless |
| 720-462 | Verizon Business (MCImetro) | Landline |
| 720-463 | Onvoy (Sinch) | VoIP |
| 720-464 | Bandwidth.com | VoIP |
| 720-465 | AT&T Mobility | Wireless |
| 720-466 | AT&T Mobility | Wireless |
| 720-467 | Verizon Wireless | Wireless |
| 720-468 | Lumen (Level 3) | VoIP |
| 720-469 | AT&T Mobility | Wireless |
| 720-470 | Verizon Wireless | Wireless |
| 720-471 | Verizon Wireless | Wireless |
| 720-472 | AT&T (Teleport Communications) | Landline |
| 720-473 | Onvoy (Sinch) | VoIP |
| 720-474 | T-Mobile | Wireless |
| 720-475 | AT&T (Teleport Communications) | Landline |
| 720-476 | AT&T Mobility | Wireless |
| 720-477 | Onvoy (Sinch) | VoIP |
| 720-478 | Lumen (Level 3) | VoIP |
| 720-479 | AT&T (Teleport Communications) | Landline |
| 720-480 | AT&T Mobility | Wireless |
| 720-481 | AT&T Mobility | Wireless |
| 720-482 | Qwest Corporation | Landline |
| 720-483 | AT&T Mobility | Wireless |
| 720-484 | Allstream (Electric Lightwave) | Landline |
| 720-485 | Comcast (Xfinity Voice) | VoIP |
| 720-486 | AT&T Mobility | Wireless |
| 720-487 | Telnyx | Landline |
| 720-488 | Qwest Corporation | Landline |
| 720-489 | Qwest Corporation | Landline |
| 720-490 | T-Mobile | Wireless |
| 720-491 | AT&T Mobility | Wireless |
| 720-492 | T-Mobile | Wireless |
| 720-493 | Qwest Corporation | Landline |
| 720-494 | Qwest Corporation | Landline |
| 720-495 | AT&T Mobility | Wireless |
| 720-496 | Lumen (Level 3) | VoIP |
| 720-497 | Qwest Corporation | Landline |
| 720-498 | Verizon Wireless | Wireless |
| 720-499 | T-Mobile | Wireless |
| 720-500 | Peerless Network | VoIP |
| 720-501 | Metro by T-Mobile (MetroPCS) | Wireless |
| 720-502 | Comcast (Xfinity Voice) | VoIP |
| 720-503 | AT&T Mobility | Wireless |
| 720-504 | Bandwidth.com | VoIP |
| 720-505 | Verizon Wireless | Wireless |
| 720-506 | Lumen (Level 3) | VoIP |
| 720-507 | Bandwidth.com | VoIP |
| 720-508 | Allstream (Electric Lightwave) | Landline |
| 720-509 | Verizon Business (MCImetro) | Landline |
| 720-510 | Comcast (Xfinity Voice) | VoIP |
| 720-512 | Comcast (Xfinity Voice) | VoIP |
| 720-513 | Onvoy (Sinch) | VoIP |
| 720-514 | AT&T (Teleport Communications) | Landline |
| 720-515 | Bandwidth.com | VoIP |
| 720-516 | Qwest Corporation | Landline |
| 720-517 | AT&T Mobility | Wireless |
| 720-518 | Allstream (Electric Lightwave) | Landline |
| 720-519 | AT&T (Teleport Communications) | Landline |
| 720-520 | Onvoy Spectrum (Sinch) | VoIP |
| 720-521 | American Messaging (paging) | Landline |
| 720-522 | Verizon Business (MCImetro) | Landline |
| 720-523 | Qwest Corporation | Landline |
| 720-524 | Qwest Corporation | Landline |
| 720-525 | T-Mobile | Wireless |
| 720-526 | AT&T Mobility | Wireless |
| 720-527 | Teliax | Landline |
| 720-528 | Qwest Corporation | Landline |
| 720-529 | Qwest Corporation | Landline |
| 720-530 | AT&T Mobility | Wireless |
| 720-531 | Comcast (Xfinity Voice) | VoIP |
| 720-532 | AT&T (Teleport Communications) | Landline |
| 720-533 | AT&T (Teleport Communications) | Landline |
| 720-534 | Vonage | VoIP |
| 720-535 | AT&T (Teleport Communications) | Landline |
| 720-536 | Qwest Corporation | Landline |
| 720-537 | Fasttrack Communications | Landline |
| 720-538 | Verizon Wireless | Wireless |
| 720-539 | AT&T Mobility | Wireless |
| 720-540 | Qwest Corporation | Landline |
| 720-541 | Verizon Wireless | Wireless |
| 720-542 | Qwest Corporation | Landline |
| 720-543 | Peerless Network | VoIP |
| 720-544 | Qwest Corporation | Landline |
| 720-545 | Lumen (Level 3) | VoIP |
| 720-546 | T-Mobile | Wireless |
| 720-547 | Bandwidth.com | VoIP |
| 720-548 | Lumen (Level 3) | VoIP |
| 720-549 | Lumen (Level 3) | VoIP |
| 720-550 | Windstream (Paetec) | Landline |
| 720-551 | AT&T Mobility | Wireless |
| 720-552 | Verizon Wireless | Wireless |
| 720-553 | Qwest Corporation | Landline |
| 720-554 | Qwest Corporation | Landline |
| 720-556 | Verizon Wireless | Wireless |
| 720-557 | Verizon Wireless | Wireless |
| 720-558 | Qwest Corporation | Landline |
| 720-559 | AT&T (Teleport Communications) | Landline |
| 720-560 | AT&T Mobility | Wireless |
| 720-561 | Qwest Corporation | Landline |
| 720-562 | Qwest Corporation | Landline |
| 720-563 | Qwest Corporation | Landline |
| 720-564 | Qwest Corporation | Landline |
| 720-565 | Qwest Corporation | Landline |
| 720-566 | Qwest Corporation | Landline |
| 720-567 | Lumen (Level 3) | VoIP |
| 720-568 | Qwest Corporation | Landline |
| 720-569 | AT&T Mobility | Wireless |
| 720-570 | Qwest Corporation | Landline |
| 720-571 | Onvoy (Sinch) | VoIP |
| 720-572 | AT&T (Teleport Communications) | Landline |
| 720-573 | Lumen (Level 3) | VoIP |
| 720-574 | Bandwidth.com | VoIP |
| 720-575 | Onvoy (Sinch) | VoIP |
| 720-576 | Verizon Wireless | Wireless |
| 720-577 | Lumen (Level 3) | VoIP |
| 720-578 | Qwest Corporation | Landline |
| 720-579 | Verizon Business (MCImetro) | Landline |
| 720-580 | Bandwidth.com | VoIP |
| 720-581 | T-Mobile | Wireless |
| 720-582 | Verizon Wireless | Wireless |
| 720-583 | Onvoy (Sinch) | VoIP |
| 720-584 | Verizon Wireless | Wireless |
| 720-585 | T-Mobile | Wireless |
| 720-586 | Metro by T-Mobile (MetroPCS) | Wireless |
| 720-587 | AT&T (Teleport Communications) | Landline |
| 720-588 | Nuso | Landline |
| 720-589 | T-Mobile | Wireless |
| 720-590 | Onvoy (Sinch) | VoIP |
| 720-591 | Verizon Wireless | Wireless |
| 720-592 | T-Mobile | Wireless |
| 720-593 | Lumen (Level 3) | VoIP |
| 720-594 | Airus | Landline |
| 720-595 | Lumen (Level 3) | VoIP |
| 720-596 | AT&T (Teleport Communications) | Landline |
| 720-597 | Verizon Wireless | Wireless |
| 720-598 | Bandwidth.com | VoIP |
| 720-599 | Allstream (Electric Lightwave) | Landline |
| 720-600 | Onvoy (Sinch) | VoIP |
| 720-601 | Verizon Wireless | Wireless |
| 720-602 | T-Mobile | Wireless |
| 720-603 | Lumen (Level 3) | VoIP |
| 720-604 | Bandwidth.com | VoIP |
| 720-605 | Onvoy (Sinch) | VoIP |
| 720-606 | AT&T Mobility | Wireless |
| 720-607 | Verizon Wireless | Wireless |
| 720-608 | Bandwidth.com | VoIP |
| 720-609 | AT&T Mobility | Wireless |
| 720-610 | Verizon Wireless | Wireless |
| 720-612 | T-Mobile | Wireless |
| 720-613 | Verizon Business (MCImetro) | Landline |
| 720-614 | Airespring | Landline |
| 720-615 | Bandwidth.com | VoIP |
| 720-616 | Lumen (Level 3) | VoIP |
| 720-617 | Windstream (Paetec) | Landline |
| 720-618 | Verizon Wireless | Wireless |
| 720-619 | Bandwidth.com | VoIP |
| 720-620 | AT&T Mobility | Wireless |
| 720-621 | AT&T Mobility | Wireless |
| 720-622 | Qwest Corporation | Landline |
| 720-623 | Onvoy (Sinch) | VoIP |
| 720-624 | AT&T (Teleport Communications) | Landline |
| 720-625 | Windstream (Paetec) | Landline |
| 720-626 | Verizon Wireless | Wireless |
| 720-627 | Qwest Corporation | Landline |
| 720-628 | AT&T Mobility | Wireless |
| 720-629 | AT&T Mobility | Wireless |
| 720-630 | AT&T Mobility | Wireless |
| 720-631 | Verizon Business (MCImetro) | Landline |
| 720-632 | AT&T (Teleport Communications) | Landline |
| 720-633 | AT&T Mobility | Wireless |
| 720-634 | Verizon Business (MCImetro) | Landline |
| 720-635 | AT&T Mobility | Wireless |
| 720-636 | Verizon Wireless | Wireless |
| 720-637 | Onvoy (Sinch) | VoIP |
| 720-638 | Comcast (Xfinity Voice) | VoIP |
| 720-639 | Onvoy (Sinch) | VoIP |
| 720-640 | Lumen (Level 3) | VoIP |
| 720-641 | T-Mobile | Wireless |
| 720-642 | Verizon Wireless | Wireless |
| 720-643 | Lumen (Level 3) | VoIP |
| 720-644 | Windstream (Paetec) | Landline |
| 720-645 | T-Mobile | Wireless |
| 720-646 | AT&T Mobility | Wireless |
| 720-647 | Onvoy (Sinch) | VoIP |
| 720-648 | Verizon Wireless | Wireless |
| 720-649 | Bandwidth.com | VoIP |
| 720-650 | Onvoy (Sinch) | VoIP |
| 720-651 | Verizon Wireless | Wireless |
| 720-652 | Qwest Corporation | Landline |
| 720-653 | Verizon Wireless | Wireless |
| 720-654 | AT&T Mobility | Wireless |
| 720-655 | T-Mobile | Wireless |
| 720-656 | AT&T Mobility | Wireless |
| 720-657 | Bandwidth.com | VoIP |
| 720-658 | Telstar Communications | Landline |
| 720-659 | Vonage | VoIP |
| 720-660 | Verizon Wireless | Wireless |
| 720-661 | Verizon Wireless | Wireless |
| 720-662 | T-Mobile | Wireless |
| 720-663 | Bandwidth.com | VoIP |
| 720-664 | Onvoy (Sinch) | VoIP |
| 720-665 | Verizon Wireless | Wireless |
| 720-666 | Peerless Network | VoIP |
| 720-667 | Comcast (Xfinity Voice) | VoIP |
| 720-668 | Verizon Wireless | Wireless |
| 720-669 | Onvoy (Sinch) | VoIP |
| 720-670 | Verizon Wireless | Wireless |
| 720-671 | Verizon Wireless | Wireless |
| 720-672 | Verizon Wireless | Wireless |
| 720-673 | Exiant Communications | Landline |
| 720-674 | Comcast (Xfinity Voice) | VoIP |
| 720-675 | AT&T Mobility | Wireless |
| 720-676 | Verizon Business (MCImetro) | Landline |
| 720-677 | Onvoy (Sinch) | VoIP |
| 720-678 | Csc Wireless | Wireless |
| 720-679 | Onvoy (Sinch) | VoIP |
| 720-680 | T-Mobile | Wireless |
| 720-681 | T-Mobile | Wireless |
| 720-682 | Verizon Wireless | Wireless |
| 720-683 | Bandwidth.com | VoIP |
| 720-684 | Lumen (Level 3) | VoIP |
| 720-685 | Qwest Corporation | Landline |
| 720-686 | Verizon Business (MCImetro) | Landline |
| 720-687 | T-Mobile | Wireless |
| 720-688 | AT&T Mobility | Wireless |
| 720-689 | Bandwidth.com | VoIP |
| 720-690 | AT&T Mobility | Wireless |
| 720-691 | T-Mobile | Wireless |
| 720-692 | Metro by T-Mobile (MetroPCS) | Wireless |
| 720-693 | Verizon Wireless | Wireless |
| 720-694 | T-Mobile | Wireless |
| 720-695 | Verizon Business (MCImetro) | Landline |
| 720-696 | Bandwidth.com | VoIP |
| 720-697 | Lumen (CenturyLink) | Landline |
| 720-698 | Verizon Wireless | Wireless |
| 720-699 | Onvoy (Sinch) | VoIP |
| 720-701 | AT&T (Teleport Communications) | Landline |
| 720-702 | Onvoy (Sinch) | VoIP |
| 720-703 | Nuso | Landline |
| 720-704 | T-Mobile | Wireless |
| 720-705 | AT&T Mobility | Wireless |
| 720-706 | Onvoy (Sinch) | VoIP |
| 720-707 | Onvoy (Sinch) | VoIP |
| 720-708 | Teliax | Landline |
| 720-709 | Windstream (Paetec) | Landline |
| 720-710 | Onvoy (Sinch) | VoIP |
| 720-712 | Bandwidth.com | VoIP |
| 720-713 | Onvoy (Sinch) | VoIP |
| 720-714 | Onvoy (Sinch) | VoIP |
| 720-715 | Bandwidth.com | VoIP |
| 720-716 | Lumen (Level 3) | VoIP |
| 720-717 | AT&T Mobility | Wireless |
| 720-718 | Qwest Corporation | Landline |
| 720-719 | Bandwidth.com | VoIP |
| 720-720 | AT&T Mobility | Wireless |
| 720-721 | The Voice Application Network | Landline |
| 720-722 | Lumen (CenturyLink) | Landline |
| 720-723 | Allstream (Electric Lightwave) | Landline |
| 720-724 | Allstream (Electric Lightwave) | Landline |
| 720-725 | T-Mobile | Wireless |
| 720-726 | Comcast (Xfinity Voice) | VoIP |
| 720-727 | Bandwidth.com | VoIP |
| 720-728 | Lumen (Level 3) | VoIP |
| 720-729 | Bandwidth.com | VoIP |
| 720-730 | Onvoy (Sinch) | VoIP |
| 720-731 | Lumen (Level 3) | VoIP |
| 720-732 | T-Mobile | Wireless |
| 720-733 | Qwest Corporation | Landline |
| 720-734 | Onvoy (Sinch) | VoIP |
| 720-735 | Onvoy (Sinch) | VoIP |
| 720-736 | Onvoy (Sinch) | VoIP |
| 720-737 | Verizon Wireless | Wireless |
| 720-738 | Onvoy (Sinch) | VoIP |
| 720-739 | Bandwidth.com | VoIP |
| 720-740 | Hd Carrier | Landline |
| 720-741 | Onvoy (Sinch) | VoIP |
| 720-742 | T-Mobile | Wireless |
| 720-743 | Bandwidth.com | VoIP |
| 720-744 | Qwest Corporation | Landline |
| 720-745 | Lumen (Level 3) | VoIP |
| 720-746 | Qwest Corporation | Landline |
| 720-747 | Qwest Corporation | Landline |
| 720-748 | Qwest Corporation | Landline |
| 720-749 | Peerless Network | VoIP |
| 720-750 | T-Mobile | Wireless |
| 720-751 | T-Mobile | Wireless |
| 720-752 | Lumen (Level 3) | VoIP |
| 720-753 | AT&T Mobility | Wireless |
| 720-754 | Lumen (Level 3) | VoIP |
| 720-755 | T-Mobile | Wireless |
| 720-756 | T-Mobile | Wireless |
| 720-757 | T-Mobile | Wireless |
| 720-758 | Lumen (CenturyLink) | Landline |
| 720-759 | Bandwidth.com | VoIP |
| 720-760 | Twilio | VoIP |
| 720-761 | T-Mobile | Wireless |
| 720-762 | Verizon Wireless | Wireless |
| 720-763 | AT&T Mobility | Wireless |
| 720-764 | Onvoy (Sinch) | VoIP |
| 720-765 | Verizon Wireless | Wireless |
| 720-766 | FracTEL | Landline |
| 720-767 | T-Mobile | Wireless |
| 720-768 | Commio | Landline |
| 720-769 | Vonage | VoIP |
| 720-770 | Bandwidth.com | VoIP |
| 720-771 | T-Mobile | Wireless |
| 720-772 | Allstream (Electric Lightwave) | Landline |
| 720-773 | Verizon Business (MCImetro) | Landline |
| 720-774 | AT&T Mobility | Wireless |
| 720-775 | AT&T Mobility | Wireless |
| 720-776 | Peerless Network | VoIP |
| 720-777 | Qwest Corporation | Landline |
| 720-778 | Bandwidth.com | VoIP |
| 720-779 | Bandwidth.com | VoIP |
| 720-780 | Onvoy (Sinch) | VoIP |
| 720-781 | T-Mobile | Wireless |
| 720-782 | AT&T Local | Landline |
| 720-783 | Onvoy (Sinch) | VoIP |
| 720-784 | Onvoy (Sinch) | VoIP |
| 720-785 | AT&T (Teleport Communications) | Landline |
| 720-786 | T-Mobile | Wireless |
| 720-787 | Metro by T-Mobile (MetroPCS) | Wireless |
| 720-788 | Verizon Wireless | Wireless |
| 720-789 | Lumen (Level 3) | VoIP |
| 720-790 | Onvoy (Sinch) | VoIP |
| 720-791 | Telnyx | Landline |
| 720-792 | Onvoy (Sinch) | VoIP |
| 720-793 | Verizon Wireless | Wireless |
| 720-794 | Onvoy (Sinch) | VoIP |
| 720-795 | Lumen (CenturyLink) | Landline |
| 720-796 | Nuso | Landline |
| 720-797 | Bandwidth.com | VoIP |
| 720-798 | Bandwidth.com | VoIP |
| 720-799 | Onvoy (Sinch) | VoIP |
| 720-800 | Onvoy (Sinch) | VoIP |
| 720-801 | Hd Carrier | Landline |
| 720-802 | Onvoy (Sinch) | VoIP |
| 720-803 | T-Mobile | Wireless |
| 720-804 | T-Mobile | Wireless |
| 720-805 | Voip Innovations | VoIP |
| 720-806 | Peerless Network | VoIP |
| 720-807 | Onvoy (Sinch) | VoIP |
| 720-808 | Bandwidth.com | VoIP |
| 720-809 | Metro by T-Mobile (MetroPCS) | Wireless |
| 720-810 | Verizon Wireless | Wireless |
| 720-812 | Verizon Wireless | Wireless |
| 720-813 | Ip Horizon | Landline |
| 720-814 | Verizon Wireless | Wireless |
| 720-815 | Comcast (Xfinity Voice) | VoIP |
| 720-816 | Onvoy Spectrum (Sinch) | VoIP |
| 720-817 | Comcast (Xfinity Voice) | VoIP |
| 720-818 | Verizon Wireless | Wireless |
| 720-819 | T-Mobile | Wireless |
| 720-820 | Wide Voice | Landline |
| 720-821 | Onvoy (Sinch) | VoIP |
| 720-822 | Verizon Wireless | Wireless |
| 720-823 | Onvoy (Sinch) | VoIP |
| 720-824 | Vonage | VoIP |
| 720-825 | Hd Carrier | Landline |
| 720-826 | Comcast (Xfinity Voice) | VoIP |
| 720-827 | T-Mobile | Wireless |
| 720-828 | T-Mobile | Wireless |
| 720-829 | Metro by T-Mobile (MetroPCS) | Wireless |
| 720-830 | Hd Carrier | Landline |
| 720-831 | AT&T (Teleport Communications) | Landline |
| 720-832 | Onvoy Spectrum (Sinch) | VoIP |
| 720-833 | Qwest Corporation | Landline |
| 720-834 | AT&T (Teleport Communications) | Landline |
| 720-835 | AT&T Mobility | Wireless |
| 720-836 | Lumen (Level 3) | VoIP |
| 720-837 | T-Mobile | Wireless |
| 720-838 | T-Mobile | Wireless |
| 720-839 | T-Mobile | Wireless |
| 720-840 | T-Mobile | Wireless |
| 720-841 | T-Mobile | Wireless |
| 720-842 | Qwest Corporation | Landline |
| 720-843 | Onvoy Spectrum (Sinch) | VoIP |
| 720-844 | Leap Telecom | Landline |
| 720-845 | T-Mobile | Wireless |
| 720-846 | Verizon Wireless | Wireless |
| 720-847 | Qwest Corporation | Landline |
| 720-848 | Qwest Corporation | Landline |
| 720-849 | T-Mobile | Wireless |
| 720-850 | Five9 | Landline |
| 720-851 | Qwest Corporation | Landline |
| 720-852 | Qwest Corporation | Landline |
| 720-853 | Bandwidth.com | VoIP |
| 720-854 | Qwest Corporation | Landline |
| 720-855 | Qwest Corporation | Landline |
| 720-856 | Onvoy (Sinch) | VoIP |
| 720-857 | Qwest Corporation | Landline |
| 720-858 | Qwest Corporation | Landline |
| 720-859 | Qwest Corporation | Landline |
| 720-860 | Onvoy Spectrum (Sinch) | VoIP |
| 720-861 | Bandwidth.com | VoIP |
| 720-862 | Verizon Business (MCImetro) | Landline |
| 720-863 | Verizon Business (MCImetro) | Landline |
| 720-864 | Qwest Corporation | Landline |
| 720-865 | Lumen (Level 3) | VoIP |
| 720-866 | Terra Nova Telecom | Landline |
| 720-868 | Onvoy (Sinch) | VoIP |
| 720-869 | AT&T Mobility | Wireless |
| 720-870 | Qwest Corporation | Landline |
| 720-871 | T-Mobile | Wireless |
| 720-872 | Qwest Corporation | Landline |
| 720-873 | Qwest Corporation | Landline |
| 720-874 | Qwest Corporation | Landline |
| 720-875 | Qwest Corporation | Landline |
| 720-876 | Qwest Corporation | Landline |
| 720-877 | Lumen (Level 3) | VoIP |
| 720-878 | AT&T Mobility | Wireless |
| 720-879 | Lumen (Level 3) | VoIP |
| 720-880 | Verizon Wireless | Wireless |
| 720-881 | Bandwidth.com | VoIP |
| 720-882 | AT&T Mobility | Wireless |
| 720-883 | Lumen (Level 3) | VoIP |
| 720-884 | Qwest Corporation | Landline |
| 720-885 | AT&T Mobility | Wireless |
| 720-886 | Qwest Corporation | Landline |
| 720-887 | Qwest Corporation | Landline |
| 720-888 | Lumen (Level 3) | VoIP |
| 720-889 | Verizon Business (MCImetro) | Landline |
| 720-890 | Qwest Corporation | Landline |
| 720-891 | Lumen (Level 3) | VoIP |
| 720-892 | Bandwidth.com | VoIP |
| 720-893 | Bandwidth.com | VoIP |
| 720-894 | Bandwidth.com | VoIP |
| 720-895 | Qwest Corporation | Landline |
| 720-896 | T-Mobile | Wireless |
| 720-897 | Lumen (Level 3) | VoIP |
| 720-898 | Qwest Corporation | Landline |
| 720-899 | Verizon Wireless | Wireless |
| 720-900 | Peerless Network | VoIP |
| 720-901 | Telnyx | Landline |
| 720-902 | Verizon Wireless | Wireless |
| 720-903 | Lumen (Level 3) | VoIP |
| 720-904 | Qwest Corporation | Landline |
| 720-905 | Five9 | Landline |
| 720-906 | Comcast (Xfinity Voice) | VoIP |
| 720-907 | Lumen (Level 3) | VoIP |
| 720-908 | Verizon Wireless | Wireless |
| 720-909 | Bandwidth.com | VoIP |
| 720-910 | Verizon Wireless | Wireless |
| 720-912 | Onvoy (Sinch) | VoIP |
| 720-913 | Lumen (Level 3) | VoIP |
| 720-914 | T-Mobile | Wireless |
| 720-915 | Vonage | VoIP |
| 720-916 | Verizon Wireless | Wireless |
| 720-917 | Qwest Corporation | Landline |
| 720-918 | Vonage | VoIP |
| 720-919 | T-Mobile | Wireless |
| 720-920 | AT&T (Teleport Communications) | Landline |
| 720-921 | Lumen (Level 3) | VoIP |
| 720-922 | Qwest Corporation | Landline |
| 720-923 | Advanced Telecom Solutions | Landline |
| 720-924 | Qwest Corporation | Landline |
| 720-925 | Comcast (Xfinity Voice) | VoIP |
| 720-926 | Verizon Wireless | Wireless |
| 720-927 | Bandwidth.com | VoIP |
| 720-928 | Bandwidth.com | VoIP |
| 720-929 | Qwest Corporation | Landline |
| 720-930 | Verizon Wireless | Wireless |
| 720-931 | Qwest Corporation | Landline |
| 720-932 | Qwest Corporation | Landline |
| 720-933 | T-Mobile | Wireless |
| 720-934 | T-Mobile | Wireless |
| 720-935 | T-Mobile | Wireless |
| 720-936 | T-Mobile | Wireless |
| 720-937 | T-Mobile | Wireless |
| 720-938 | T-Mobile | Wireless |
| 720-939 | T-Mobile | Wireless |
| 720-940 | T-Mobile | Wireless |
| 720-941 | Qwest Corporation | Landline |
| 720-942 | Qwest Corporation | Landline |
| 720-943 | Lumen (Level 3) | VoIP |
| 720-944 | Qwest Corporation | Landline |
| 720-945 | Qwest Corporation | Landline |
| 720-946 | Qwest Corporation | Landline |
| 720-947 | Qwest Corporation | Landline |
| 720-948 | Verizon Wireless | Wireless |
| 720-949 | AT&T (Teleport Communications) | Landline |
| 720-951 | Verizon Wireless | Wireless |
| 720-952 | Vonage | VoIP |
| 720-953 | T-Mobile | Wireless |
| 720-954 | Verizon Wireless | Wireless |
| 720-955 | Verizon Wireless | Wireless |
| 720-956 | Qwest Corporation | Landline |
| 720-957 | T-Mobile | Wireless |
| 720-960 | AT&T Mobility | Wireless |
| 720-961 | Lumen (Level 3) | VoIP |
| 720-962 | Qwest Corporation | Landline |
| 720-963 | Qwest Corporation | Landline |
| 720-964 | T-Mobile | Wireless |
| 720-965 | T-Mobile | Wireless |
| 720-966 | AT&T Mobility | Wireless |
| 720-967 | Leap Telecom | Landline |
| 720-968 | AT&T Mobility | Wireless |
| 720-969 | AT&T Mobility | Wireless |
| 720-970 | Bandwidth.com | VoIP |
| 720-971 | T-Mobile | Wireless |
| 720-972 | Qwest Corporation | Landline |
| 720-973 | Hadlo Technologies | Landline |
| 720-974 | Allstream (Electric Lightwave) | Landline |
| 720-975 | Allstream (Electric Lightwave) | Landline |
| 720-977 | Qwest Corporation | Landline |
| 720-978 | Nuso | Landline |
| 720-979 | T-Mobile | Wireless |
| 720-980 | T-Mobile | Wireless |
| 720-981 | Qwest Corporation | Landline |
| 720-982 | T-Mobile | Wireless |
| 720-983 | AT&T Mobility | Wireless |
| 720-984 | T-Mobile | Wireless |
| 720-985 | T-Mobile | Wireless |
| 720-986 | Bandwidth.com | VoIP |
| 720-987 | T-Mobile | Wireless |
| 720-988 | T-Mobile | Wireless |
| 720-989 | T-Mobile | Wireless |
| 720-990 | Lumen (Level 3) | VoIP |
| 720-991 | Commio | Landline |
| 720-992 | AT&T (Teleport Communications) | Landline |
| 720-993 | AT&T Mobility | Wireless |
| 720-994 | T-Mobile | Wireless |
| 720-995 | Eon Telecom | Landline |
| 720-996 | Commio | Landline |
| 720-997 | Comcast (Xfinity Voice) | VoIP |
| 720-998 | Comcast (Xfinity Voice) | VoIP |
| 720-999 | T-Mobile | Wireless |
Line type reflects the registry assignment; ported numbers can differ. Unknown 720 number calling? ActiveArmor® screens it before you ever look it up.
Cities & Communities in and around Area Code 720
Communities the 720 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 |
|---|---|---|
| Aurora | 80018, 80017, 80013 | Fiber up to 1 GIG |
| Boulder | 80310, 80304, 80301 | Fiber up to 1 GIG |
| Brighton | 80601, 80602, 80640 | Fiber up to 1 GIG |
| Commerce City | 80022, 80640, 80601 | Fiber up to 1 GIG |
| Denver | 80238, 80010, 80207 | Fiber up to 1 GIG |
| Edgewater | 80214, 80212, 80204 | Fiber up to 1 GIG |
| Englewood | 80110, 80113, 80236 | Fiber up to 1 GIG |
| Erie | 80516, 80026, 80023 | Fiber up to 1 GIG |
| Firestone | 80520, 80530, 80504 | Fiber up to 1 GIG |
| Frederick | 80520, 80514, 80530 | Fiber up to 1 GIG |
| Greenwood Village | 80111, 80237, 80121 | Fiber up to 1 GIG |
| Idaho Springs | 80427, 80452, 80436 | Internet Air |
| Lafayette | 80026, 80027, 80020 | Fiber up to 1 GIG |
| Lakewood | 80226, 80232, 80227 | Fiber up to 1 GIG |
| Littleton | 80120, 80129, 80123 | Fiber up to 1 GIG |
| Longmont | 80501, 80504, 80503 | Fiber up to 1 GIG |
| Louisville | 80027, 80303, 80026 | Fiber up to 1 GIG |
| Niwot | 80544, 80301, 80501 | Fiber up to 1 GIG |
| Sheridan | 80110, 80236, 80113 | Fiber up to 1 GIG |
| Thornton | 80241, 80233, 80234 | Fiber up to 1 GIG |
| Westminster | 80031, 80021, 80260 | Fiber up to 1 GIG |
| Wheat Ridge | 80033, 80002, 80215 | Fiber up to 1 GIG |
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.
720 Area Code Map
Area code 720 serves Denver and nearby communities in CO.
↓ Printable PDF
Open the printable 720 map (PDF) · All Colorado area codes · Home internet in Denver
Counties Covered by the 720 Area Code
Counties are served in whole or in part; population is U.S. Census Bureau ACS 2023. The 720 also reaches parts of Boulder County, Weld County, Clear Creek County.
The 720, explained
Area Code 720: More Than a Number in Denver
In Denver, the 720 is more than digits on a caller ID. It arrived in 1998, layered onto the 303 region, and it has meant Denver and surrounding communities ever since — 785 carrier prefixes keep its lines busy today, and an established 720 number still says you’ve been here a while.
The map tells its own story: Denver and surrounding communities, with 303 and 983 sharing the same streets today. Several codes, one local calling area, no long-distance between any of them — only the 720 came first.
Keeping a 720 matters here. An existing 720 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 303 instead — one more reason locals hold on to theirs.
Need a new local number? Shop plans Keep your 720: bring it to AT&TInternet, wireless & stores in the 720
AT&T Home Internet in Area Code 720
AT&T home internet serves communities across area code 720, 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 720? AT&T Business Internet is available at many addresses.
Fiber install day in the 720Check your address ›
Moving to Area Code 720?
Set up home internet in area code 720 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 720 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 720
AT&T’s 5G network covers most of area code 720. ActiveArmor® spam blocking is included with every unlimited plan, your 720 number stays yours, and great cell phone deals in Denver are a tap away.
5G across the 720ActiveArmor® includedKeep your 720 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 720 number? Ask when you activate a line: the 720 shares its territory with 303 and 983, so new lines may draw one of those codes, and porting an existing 720 number keeps it yours.
Stay connected across DenverShop wireless plans ›
AT&T Stores in Area Code 720
Looking for cell phone stores in area code 720? These stores answer on 720 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 DenverFind your store ›
All AT&T Stores with 720 Numbers
Every store below answers on a 720 number. Tap any number to call.
30 AT&T stores with 720 numbers
International Calling from Area Code 720
Calling abroad from area code 720? 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 720 calls most:MexicoIndiaChinaVietnamCanada
Top places of birth among foreign-born residents of the 720’s counties, U.S. Census Bureau ACS 2023.
Calling abroad from a 720 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.
Denver calls the worldSee international plans ›
720 Area Code Quick Facts & Dialing
StateColorado
Time zoneMountain
Established1998added to the 303 region
Dialing10 digitsrequired
Toll-free?Nogeographic code
Population3.14Mcounties served, Census 2023
Largest cityDenver+21 more ›
How to dial a 720 number
| Scenario | Format | Example |
|---|---|---|
| Local call (within the region) | 720 + 7-digit number | (720) 555-0100 |
| Long distance (within the U.S.) | 1 + 720 + 7-digit number | 1 (720) 555-0100 |
| Calling 720 from another country | +1 720 + 7-digit number | +1 720 555 0100 |
| From a mobile phone | (720) + 7-digit number | (720) 555-0100 |
A Short History of Area Code 720
Added in 1998 to the 303 region, the 720 serves Denver and surrounding communities. No splits or overlays have divided its territory since.
1998Added to the 303 region
In service since 1998. Today the 720’s territory is shared with overlay codes 303 and 983, so ten-digit dialing is required.
Nearby & Related Area Codes
Browse area codes by state: Colorado (6) · California (41) · Texas (29) · Florida (23) · all 50 states ›
Area Code 720 FAQ
What area code is 720?
720 is the area code for Denver, Colorado and the surrounding communities. It appears at the front of every local 10-digit phone number in the area.
Where is area code 720?
Area code 720 serves Denver, Colorado and nearby communities including Aurora, Boulder, Brighton. The full city list is in the cities table above.
Why did I get a text message from a 720 number?
The most common 720 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 720?
A 720 number usually means Denver 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 720?
Mountain time. The live local time is shown at the top of this page.
Why am I getting calls from 720 numbers?
720 is an active, legitimate Colorado 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 720 prefixes are drawing complaints right now.
Is 720 a toll-free number?
No. 720 is a geographic area code tied to Denver, Colorado. Toll-free calls come from 800, 833, 844, 855, 866, 877 and 888 numbers.
What’s the difference between 720 and 303?
Nothing on the map: 720 is an overlay of 303, covering the same Denver area. Calls between them are local; only the three digits at the front differ. Overlay codes 983 share the same map.
Which cities use area code 720?
The largest communities include Aurora, Boulder, Brighton, Commerce City, Denver. The full list is in the cities table above.
Does AT&T offer service in the 720?
Yes: home internet, wireless and retail stores across the 720. Availability is checked address by address.
Can I still get a 720 number?
Yes. Carriers in Denver and across the 720 still issue 720 numbers on new lines, and you can port an existing 720 number to any carrier. Newer lines in the same area may also receive numbers from an overlay code.
Can I keep my 720 number if I move?
Yes. Phone numbers are portable: your 720 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.
