Phone numbers in Tucson, Arizona
Tucson has 399 phone prefixes in area code 520.
Biggest holders: CenturyLink / Lumen, Verizon Wireless, T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 40%
- Local phone company 36%
- Internet / business phone carrier 21%
- Phone company 3%
Every prefix in Tucson
Search the first six digits of a number in this list. If it's here, the number started in Tucson with the carrier shown. If it isn't, check the Arizona page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 520-202 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 520-203 | MCImetro (Verizon Business) | Internet / business phone carrier | 2003 |
| 520-204 | Windstream (PAETEC) | Internet / business phone carrier | 2003 |
| 520-205 | CenturyLink / Lumen | Local phone company | – |
| 520-206 | CenturyLink / Lumen | Local phone company | – |
| 520-207 | Comcast | Internet / business phone carrier | – |
| 520-209 | CenturyLink / Lumen | Local phone company | – |
| 520-214 | Onvoy | Internet / business phone carrier | 2015 |
| 520-218 | CenturyLink / Lumen | Local phone company | – |
| 520-219 | CenturyLink / Lumen | Local phone company | – |
| 520-222 | CenturyLink / Lumen | Local phone company | 2011 |
| 520-225 | CenturyLink / Lumen | Local phone company | – |
| 520-228 | CenturyLink / Lumen | Local phone company | – |
| 520-229 | CenturyLink / Lumen | Local phone company | – |
| 520-230 | Verizon Wireless | Mobile carrier | – |
| 520-232 | CenturyLink / Lumen | Local phone company | – |
| 520-235 | Verizon Wireless | Mobile carrier | – |
| 520-237 | Verizon Wireless | Mobile carrier | – |
| 520-239 | Teleport Communications America | Internet / business phone carrier | – |
| 520-240 | Verizon Wireless | Mobile carrier | – |
| 520-241 | AT&T Mobility | Mobile carrier | – |
| 520-243 | CenturyLink / Lumen | Local phone company | – |
| 520-244 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 520-245 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-246 | Level 3 (Lumen) | Internet / business phone carrier | 2020 |
| 520-247 | AT&T Mobility | Mobile carrier | 2001 |
| 520-248 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-250 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-256 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 520-257 | T-Mobile (including Sprint) | Mobile carrier | 2014 |
| 520-258 | CenturyLink / Lumen | Local phone company | – |
| 520-259 | North County Communications | Phone company | – |
| 520-260 | Verizon Wireless | Mobile carrier | – |
| 520-261 | Bandwidth | Internet / business phone carrier | 2009 |
| 520-262 | Verizon Wireless | Mobile carrier | 2010 |
| 520-268 | Verizon Wireless | Mobile carrier | 2013 |
| 520-269 | Verizon Wireless | Mobile carrier | 2007 |
| 520-270 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-271 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-272 | AT&T Mobility | Mobile carrier | – |
| 520-273 | AT&T Mobility | Mobile carrier | 2014 |
| 520-274 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 520-275 | AT&T Mobility | Mobile carrier | – |
| 520-276 | Bandwidth | Internet / business phone carrier | 2014 |
| 520-278 | MetroPCS (T-Mobile) | Mobile carrier | 2014 |
| 520-279 | Verizon Wireless | Mobile carrier | 2014 |
| 520-282 | Verizon Wireless | Mobile carrier | – |
| 520-283 | T-Mobile (including Sprint) | Mobile carrier | 2014 |
| 520-284 | MCImetro (Verizon Business) | Internet / business phone carrier | 2009 |
| 520-286 | T-Mobile (including Sprint) | Mobile carrier | 2013 |
| 520-288 | AT&T Mobility | Mobile carrier | 2011 |
| 520-289 | Verizon Wireless | Mobile carrier | 2006 |
| 520-290 | CenturyLink / Lumen | Local phone company | – |
| 520-291 | CenturyLink / Lumen | Local phone company | – |
| 520-292 | CenturyLink / Lumen | Local phone company | – |
| 520-293 | CenturyLink / Lumen | Local phone company | – |
| 520-294 | CenturyLink / Lumen | Local phone company | – |
| 520-295 | CenturyLink / Lumen | Local phone company | – |
| 520-296 | CenturyLink / Lumen | Local phone company | – |
| 520-297 | CenturyLink / Lumen | Local phone company | – |
| 520-298 | CenturyLink / Lumen | Local phone company | – |
| 520-299 | CenturyLink / Lumen | Local phone company | – |
| 520-300 | Verizon Wireless | Mobile carrier | 2007 |
| 520-301 | AT&T Mobility | Mobile carrier | 2007 |
| 520-302 | AT&T Mobility | Mobile carrier | 2007 |
| 520-303 | Onvoy | Internet / business phone carrier | 2008 |
| 520-304 | AT&T Mobility | Mobile carrier | – |
| 520-305 | Verizon Wireless | Mobile carrier | 2007 |
| 520-306 | Verizon Wireless | Mobile carrier | 2009 |
| 520-307 | Verizon Wireless | Mobile carrier | – |
| 520-308 | AT&T Mobility | Mobile carrier | 2009 |
| 520-309 | AT&T Mobility | Mobile carrier | 2005 |
| 520-310 | Verizon Wireless | Mobile carrier | 2009 |
| 520-312 | AT&T Mobility | Mobile carrier | – |
| 520-314 | Level 3 (Lumen) | Internet / business phone carrier | 2011 |
| 520-318 | CenturyLink / Lumen | Local phone company | – |
| 520-319 | CenturyLink / Lumen | Local phone company | – |
| 520-320 | CenturyLink / Lumen | Local phone company | – |
| 520-321 | CenturyLink / Lumen | Local phone company | – |
| 520-322 | CenturyLink / Lumen | Local phone company | – |
| 520-323 | CenturyLink / Lumen | Local phone company | – |
| 520-324 | CenturyLink / Lumen | Local phone company | – |
| 520-325 | CenturyLink / Lumen | Local phone company | – |
| 520-326 | CenturyLink / Lumen | Local phone company | – |
| 520-327 | CenturyLink / Lumen | Local phone company | – |
| 520-328 | CenturyLink / Lumen | Local phone company | 2014 |
| 520-329 | Teleport Communications America | Internet / business phone carrier | 2010 |
| 520-330 | Verizon Wireless | Mobile carrier | 2016 |
| 520-331 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-332 | T-Mobile (including Sprint) | Mobile carrier | 2012 |
| 520-333 | MCImetro (Verizon Business) | Internet / business phone carrier | 2010 |
| 520-334 | Verizon Wireless | Mobile carrier | 2008 |
| 520-336 | AT&T Mobility | Mobile carrier | 2009 |
| 520-338 | Onvoy | Internet / business phone carrier | 2011 |
| 520-339 | AT&T Mobility | Mobile carrier | 2008 |
| 520-342 | Onvoy | Internet / business phone carrier | 2007 |
| 520-343 | Verizon Wireless | Mobile carrier | 2007 |
| 520-344 | AT&T Mobility | Mobile carrier | 2007 |
| 520-345 | Verizon Wireless | Mobile carrier | 2013 |
| 520-347 | Telnyx | Internet / business phone carrier | – |
| 520-349 | Verizon Wireless | Mobile carrier | – |
| 520-351 | Level 3 (Lumen) | Internet / business phone carrier | 2005 |
| 520-352 | Allstream | Internet / business phone carrier | – |
| 520-354 | Verizon Wireless | Mobile carrier | 2016 |
| 520-355 | Bandwidth | Internet / business phone carrier | 2012 |
| 520-358 | AT&T Mobility | Mobile carrier | 2001 |
| 520-359 | MetroPCS (T-Mobile) | Mobile carrier | 2014 |
| 520-360 | AT&T Mobility | Mobile carrier | – |
| 520-365 | T-Mobile (including Sprint) | Mobile carrier | 2012 |
| 520-367 | Onvoy | Internet / business phone carrier | 2017 |
| 520-369 | Level 3 (Lumen) | Internet / business phone carrier | 2011 |
| 520-370 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-372 | Comcast | Internet / business phone carrier | 2019 |
| 520-373 | T-Mobile (including Sprint) | Mobile carrier | 2012 |
| 520-382 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 520-388 | CenturyLink / Lumen | Local phone company | – |
| 520-389 | AT&T Mobility | Mobile carrier | 2014 |
| 520-390 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-392 | AT&T Mobility | Mobile carrier | 2009 |
| 520-393 | CenturyLink / Lumen | Local phone company | – |
| 520-395 | Comcast | Internet / business phone carrier | 2007 |
| 520-396 | Verizon Wireless | Mobile carrier | 2006 |
| 520-398 | CenturyLink / Lumen | Local phone company | – |
| 520-399 | CenturyLink / Lumen | Local phone company | – |
| 520-400 | Verizon Wireless | Mobile carrier | – |
| 520-401 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-403 | Verizon Wireless | Mobile carrier | – |
| 520-404 | Verizon Wireless | Mobile carrier | – |
| 520-405 | Verizon Wireless | Mobile carrier | – |
| 520-406 | AT&T Mobility | Mobile carrier | 2001 |
| 520-407 | CenturyLink / Lumen | Local phone company | – |
| 520-408 | CenturyLink / Lumen | Local phone company | – |
| 520-409 | AT&T Mobility | Mobile carrier | – |
| 520-410 | CenturyLink / Lumen | Local phone company | – |
| 520-416 | Exiant Communications | Phone company | 2019 |
| 520-419 | Verizon Wireless | Mobile carrier | – |
| 520-420 | Hd Carrier | Internet / business phone carrier | 2019 |
| 520-425 | Verizon Wireless | Mobile carrier | 2006 |
| 520-427 | T-Mobile (including Sprint) | Mobile carrier | 2013 |
| 520-428 | AT&T Mobility | Mobile carrier | 2014 |
| 520-429 | Verizon Wireless | Mobile carrier | – |
| 520-433 | Level 3 (Lumen) | Internet / business phone carrier | 2012 |
| 520-434 | CenturyLink / Lumen | Local phone company | – |
| 520-437 | XO Arizona | Phone company | 2006 |
| 520-440 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-441 | AT&T Mobility | Mobile carrier | 2010 |
| 520-443 | T-Mobile (including Sprint) | Mobile carrier | 2007 |
| 520-444 | Verizon Wireless | Mobile carrier | – |
| 520-445 | AT&T Mobility | Mobile carrier | – |
| 520-446 | Spok | Paging service | – |
| 520-447 | Onvoy | Internet / business phone carrier | 2014 |
| 520-448 | Peerless Network Of Arizona | Internet / business phone carrier | 2014 |
| 520-449 | Verizon Wireless | Mobile carrier | – |
| 520-451 | Verizon Wireless | Mobile carrier | 2021 |
| 520-460 | T-Mobile (including Sprint) | Mobile carrier | 2012 |
| 520-461 | Allstream | Internet / business phone carrier | – |
| 520-462 | Onvoy | Internet / business phone carrier | 2017 |
| 520-465 | AT&T Mobility | Mobile carrier | – |
| 520-467 | Onvoy | Internet / business phone carrier | 2019 |
| 520-468 | Onvoy | Internet / business phone carrier | 2008 |
| 520-469 | CenturyLink / Lumen | Local phone company | – |
| 520-471 | Verizon Wireless | Mobile carrier | – |
| 520-474 | T-Mobile (including Sprint) | Mobile carrier | 2012 |
| 520-475 | Csc Wireless | Mobile carrier | 2020 |
| 520-476 | Nuso | Internet / business phone carrier | 2020 |
| 520-477 | MCImetro (Verizon Business) | Internet / business phone carrier | 2011 |
| 520-479 | T-Mobile (including Sprint) | Mobile carrier | 2020 |
| 520-481 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-482 | AT&T Mobility | Mobile carrier | 2021 |
| 520-484 | Nuso | Internet / business phone carrier | 2012 |
| 520-485 | Bandwidth | Internet / business phone carrier | 2015 |
| 520-486 | AT&T Mobility | Mobile carrier | 2020 |
| 520-488 | Verizon Wireless | Mobile carrier | – |
| 520-489 | CenturyLink / Lumen | Local phone company | – |
| 520-490 | Verizon Wireless | Mobile carrier | – |
| 520-492 | Comcast | Internet / business phone carrier | 2020 |
| 520-493 | Firstdigital Telecom | Phone company | 2019 |
| 520-495 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 520-496 | Verizon Wireless | Mobile carrier | 2020 |
| 520-497 | Bandwidth | Internet / business phone carrier | 2020 |
| 520-498 | CenturyLink / Lumen | Local phone company | – |
| 520-499 | T-Mobile (including Sprint) | Mobile carrier | 2013 |
| 520-500 | Onvoy | Internet / business phone carrier | 2015 |
| 520-501 | Twilio | Internet / business phone carrier | 2020 |
| 520-505 | Allstream | Internet / business phone carrier | 2009 |
| 520-512 | CenturyLink / Lumen | Local phone company | – |
| 520-513 | CenturyLink / Lumen | Local phone company | – |
| 520-514 | CenturyLink / Lumen | Local phone company | – |
| 520-516 | CenturyLink / Lumen | Local phone company | – |
| 520-519 | CenturyLink / Lumen | Local phone company | – |
| 520-524 | Onvoy | Internet / business phone carrier | 2020 |
| 520-526 | Commio | Internet / business phone carrier | 2017 |
| 520-528 | Verizon Wireless | Mobile carrier | 2015 |
| 520-529 | CenturyLink / Lumen | Local phone company | – |
| 520-530 | Onvoy | Internet / business phone carrier | 2020 |
| 520-531 | CenturyLink / Lumen | Local phone company | – |
| 520-534 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 520-535 | T-Mobile (including Sprint) | Mobile carrier | 2020 |
| 520-537 | IP Horizon | Internet / business phone carrier | 2021 |
| 520-539 | Verizon Wireless | Mobile carrier | 2014 |
| 520-540 | Bandwidth | Internet / business phone carrier | 2022 |
| 520-542 | Level 3 (Lumen) | Internet / business phone carrier | 2021 |
| 520-543 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 520-544 | CenturyLink / Lumen | Local phone company | – |
| 520-545 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 520-546 | CenturyLink / Lumen | Local phone company | – |
| 520-547 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 520-548 | AT&T Mobility | Mobile carrier | 2001 |
| 520-549 | Verizon Wireless | Mobile carrier | – |
| 520-551 | AT&T Mobility | Mobile carrier | 2001 |
| 520-554 | AT&T Mobility | Mobile carrier | 2021 |
| 520-561 | Verizon Wireless | Mobile carrier | – |
| 520-565 | AT&T Mobility | Mobile carrier | 2021 |
| 520-566 | CenturyLink / Lumen | Local phone company | – |
| 520-570 | CenturyLink / Lumen | Local phone company | – |
| 520-571 | CenturyLink / Lumen | Local phone company | – |
| 520-572 | CenturyLink / Lumen | Local phone company | – |
| 520-573 | CenturyLink / Lumen | Local phone company | – |
| 520-574 | CenturyLink / Lumen | Local phone company | – |
| 520-575 | CenturyLink / Lumen | Local phone company | – |
| 520-576 | CenturyLink / Lumen | Local phone company | – |
| 520-577 | CenturyLink / Lumen | Local phone company | – |
| 520-578 | CenturyLink / Lumen | Local phone company | – |
| 520-579 | CenturyLink / Lumen | Local phone company | – |
| 520-584 | CenturyLink / Lumen | Local phone company | – |
| 520-585 | MetroPCS (T-Mobile) | Mobile carrier | 2016 |
| 520-589 | Level 3 (Lumen) | Internet / business phone carrier | 2015 |
| 520-591 | Verizon Wireless | Mobile carrier | – |
| 520-594 | Wavenation | Phone company | – |
| 520-596 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 520-599 | AT&T Mobility | Mobile carrier | 2014 |
| 520-600 | Onvoy | Internet / business phone carrier | 2017 |
| 520-602 | Onvoy | Internet / business phone carrier | 2023 |
| 520-603 | Verizon Wireless | Mobile carrier | – |
| 520-605 | Bandwidth | Internet / business phone carrier | 2021 |
| 520-606 | MetroPCS (T-Mobile) | Mobile carrier | 2014 |
| 520-609 | Verizon Wireless | Mobile carrier | – |
| 520-612 | Bandwidth | Internet / business phone carrier | 2012 |
| 520-613 | AT&T Mobility | Mobile carrier | 2022 |
| 520-614 | Onvoy | Internet / business phone carrier | 2022 |
| 520-615 | CenturyLink / Lumen | Local phone company | – |
| 520-616 | CenturyLink / Lumen | Local phone company | – |
| 520-617 | CenturyLink / Lumen | Local phone company | – |
| 520-618 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 520-620 | CenturyLink / Lumen | Local phone company | – |
| 520-621 | CenturyLink / Lumen | Local phone company | – |
| 520-622 | CenturyLink / Lumen | Local phone company | – |
| 520-623 | CenturyLink / Lumen | Local phone company | – |
| 520-624 | CenturyLink / Lumen | Local phone company | – |
| 520-625 | CenturyLink / Lumen | Local phone company | – |
| 520-626 | CenturyLink / Lumen | Local phone company | – |
| 520-627 | Verizon Wireless | Mobile carrier | 2022 |
| 520-628 | CenturyLink / Lumen | Local phone company | – |
| 520-629 | CenturyLink / Lumen | Local phone company | – |
| 520-631 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-633 | Verizon Wireless | Mobile carrier | 2022 |
| 520-638 | CenturyLink / Lumen | Local phone company | 2008 |
| 520-639 | CenturyLink / Lumen | Local phone company | 2015 |
| 520-640 | Level 3 (Lumen) | Internet / business phone carrier | 2022 |
| 520-647 | CenturyLink / Lumen | Local phone company | – |
| 520-648 | CenturyLink / Lumen | Local phone company | – |
| 520-649 | Verizon Wireless | Mobile carrier | 2022 |
| 520-651 | Verizon Wireless | Mobile carrier | 2022 |
| 520-653 | Bandwidth | Internet / business phone carrier | 2022 |
| 520-658 | T-Mobile (including Sprint) | Mobile carrier | 2014 |
| 520-661 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-662 | CenturyLink / Lumen | Local phone company | 2004 |
| 520-663 | CenturyLink / Lumen | Local phone company | – |
| 520-664 | CenturyLink / Lumen | Local phone company | – |
| 520-665 | CenturyLink / Lumen | Local phone company | – |
| 520-667 | Nuso | Internet / business phone carrier | 2023 |
| 520-668 | Verizon Wireless | Mobile carrier | 2002 |
| 520-670 | CenturyLink / Lumen | Local phone company | – |
| 520-675 | Boost / Virgin Mobile | Mobile carrier | 2023 |
| 520-682 | CenturyLink / Lumen | Local phone company | – |
| 520-690 | CenturyLink / Lumen | Local phone company | – |
| 520-694 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 520-695 | CenturyLink / Lumen | Local phone company | – |
| 520-696 | CenturyLink / Lumen | Local phone company | – |
| 520-697 | Verizon Wireless | Mobile carrier | 2023 |
| 520-703 | Callworks | Phone company | 2023 |
| 520-704 | AT&T Mobility | Mobile carrier | 2010 |
| 520-710 | Onvoy | Internet / business phone carrier | 2022 |
| 520-712 | CenturyLink / Lumen | Local phone company | – |
| 520-719 | Bandwidth | Internet / business phone carrier | 2015 |
| 520-721 | CenturyLink / Lumen | Local phone company | – |
| 520-722 | CenturyLink / Lumen | Local phone company | – |
| 520-724 | CenturyLink / Lumen | Local phone company | 2011 |
| 520-729 | Verizon Wireless | Mobile carrier | 2014 |
| 520-730 | Verizon Wireless | Mobile carrier | – |
| 520-731 | CenturyLink / Lumen | Local phone company | – |
| 520-733 | CenturyLink / Lumen | Local phone company | – |
| 520-734 | Verizon Wireless | Mobile carrier | 2024 |
| 520-738 | Verizon Wireless | Mobile carrier | 2024 |
| 520-739 | Onvoy | Internet / business phone carrier | 2024 |
| 520-740 | CenturyLink / Lumen | Local phone company | – |
| 520-741 | CenturyLink / Lumen | Local phone company | – |
| 520-742 | CenturyLink / Lumen | Local phone company | – |
| 520-743 | CenturyLink / Lumen | Local phone company | – |
| 520-744 | CenturyLink / Lumen | Local phone company | – |
| 520-745 | CenturyLink / Lumen | Local phone company | – |
| 520-746 | CenturyLink / Lumen | Local phone company | – |
| 520-747 | CenturyLink / Lumen | Local phone company | – |
| 520-748 | CenturyLink / Lumen | Local phone company | – |
| 520-749 | CenturyLink / Lumen | Local phone company | – |
| 520-750 | CenturyLink / Lumen | Local phone company | – |
| 520-751 | CenturyLink / Lumen | Local phone company | – |
| 520-753 | Verizon Wireless | Mobile carrier | 2025 |
| 520-756 | AT&T Mobility | Mobile carrier | 2025 |
| 520-760 | CenturyLink / Lumen | Local phone company | – |
| 520-762 | CenturyLink / Lumen | Local phone company | – |
| 520-770 | CenturyLink / Lumen | Local phone company | – |
| 520-771 | Vonage America | Internet / business phone carrier | 2017 |
| 520-775 | Bandwidth | Internet / business phone carrier | 2014 |
| 520-777 | Level 3 (Lumen) | Internet / business phone carrier | 2004 |
| 520-780 | Verizon Wireless | Mobile carrier | – |
| 520-783 | MetroPCS (T-Mobile) | Mobile carrier | 2019 |
| 520-784 | CenturyLink / Lumen | Local phone company | – |
| 520-785 | Allo Communications | Phone company | 2025 |
| 520-789 | T-Mobile (including Sprint) | Mobile carrier | 2012 |
| 520-790 | CenturyLink / Lumen | Local phone company | – |
| 520-791 | CenturyLink / Lumen | Local phone company | – |
| 520-792 | CenturyLink / Lumen | Local phone company | – |
| 520-793 | CenturyLink / Lumen | Local phone company | – |
| 520-794 | CenturyLink / Lumen | Local phone company | – |
| 520-795 | CenturyLink / Lumen | Local phone company | – |
| 520-797 | CenturyLink / Lumen | Local phone company | – |
| 520-798 | CenturyLink / Lumen | Local phone company | – |
| 520-799 | CenturyLink / Lumen | Local phone company | – |
| 520-800 | Onvoy | Internet / business phone carrier | 2015 |
| 520-801 | Wide Voice | Phone company | 2025 |
| 520-802 | Leap Telecom | Phone company | 2025 |
| 520-806 | CenturyLink / Lumen | Local phone company | – |
| 520-807 | CenturyLink / Lumen | Local phone company | – |
| 520-808 | AT&T Mobility | Mobile carrier | 2001 |
| 520-809 | Intrado Communications | Phone company | 2014 |
| 520-812 | Bandwidth | Internet / business phone carrier | 2011 |
| 520-815 | Bandwidth | Internet / business phone carrier | 2015 |
| 520-818 | CenturyLink / Lumen | Local phone company | – |
| 520-820 | Verizon Wireless | Mobile carrier | – |
| 520-822 | CenturyLink / Lumen | Local phone company | – |
| 520-825 | CenturyLink / Lumen | Local phone company | – |
| 520-829 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 520-833 | Verizon Wireless | Mobile carrier | – |
| 520-834 | AT&T Mobility | Mobile carrier | 2001 |
| 520-837 | Teleport Communications America | Internet / business phone carrier | – |
| 520-838 | CenturyLink / Lumen | Local phone company | 2001 |
| 520-844 | Onvoy | Internet / business phone carrier | – |
| 520-848 | MetroPCS (T-Mobile) | Mobile carrier | 2015 |
| 520-849 | Verizon Wireless | Mobile carrier | 2017 |
| 520-850 | Verizon Wireless | Mobile carrier | – |
| 520-861 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-867 | AT&T Mobility | Mobile carrier | 2001 |
| 520-869 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-870 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-872 | CenturyLink / Lumen | Local phone company | – |
| 520-873 | CenturyLink / Lumen | Local phone company | – |
| 520-874 | CenturyLink / Lumen | Local phone company | – |
| 520-877 | CenturyLink / Lumen | Local phone company | – |
| 520-878 | CenturyLink / Lumen | Local phone company | – |
| 520-879 | CenturyLink / Lumen | Local phone company | – |
| 520-881 | CenturyLink / Lumen | Local phone company | – |
| 520-882 | CenturyLink / Lumen | Local phone company | – |
| 520-883 | CenturyLink / Lumen | Local phone company | – |
| 520-884 | CenturyLink / Lumen | Local phone company | – |
| 520-885 | CenturyLink / Lumen | Local phone company | – |
| 520-886 | CenturyLink / Lumen | Local phone company | – |
| 520-887 | CenturyLink / Lumen | Local phone company | – |
| 520-888 | CenturyLink / Lumen | Local phone company | – |
| 520-889 | CenturyLink / Lumen | Local phone company | – |
| 520-891 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-900 | Onvoy | Internet / business phone carrier | 2015 |
| 520-901 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 520-903 | CenturyLink / Lumen | Local phone company | – |
| 520-904 | Verizon Wireless | Mobile carrier | – |
| 520-906 | AT&T Mobility | Mobile carrier | – |
| 520-907 | AT&T Mobility | Mobile carrier | – |
| 520-908 | CenturyLink / Lumen | Local phone company | – |
| 520-909 | Verizon Wireless | Mobile carrier | – |
| 520-910 | Onvoy | Internet / business phone carrier | 2021 |
| 520-912 | AT&T Mobility | Mobile carrier | 2013 |
| 520-917 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 520-918 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 520-922 | Ahoi | Phone company | 2026 |
| 520-934 | TON80 Communications | Internet / business phone carrier | 2021 |
| 520-940 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-954 | Verizon Wireless | Mobile carrier | – |
| 520-955 | Verizon Wireless | Mobile carrier | – |
| 520-965 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 520-971 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-975 | Verizon Wireless | Mobile carrier | – |
| 520-977 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-979 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-981 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-982 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-989 | Allstream | Internet / business phone carrier | – |
| 520-990 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-991 | T-Mobile (including Sprint) | Mobile carrier | – |
| 520-999 | Onvoy | Internet / business phone carrier | 2012 |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.