Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
TUCSON prefixes in area code 520
NANPA records 400 assigned NXX blocks to rate center TUCSON in area code 520, 57.2% of the 699 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 41 holders hold those blocks, the largest being QWEST CORPORATION (143), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ (65), T-MOBILE USA, INC. (47). The earliest assignment on record here is 2001-01-18 and the most recent 2026-10-16. 250 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.
400 assigned blocks – 57.2% of 520
41 holders of record
250 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 520-202 | Lumen LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | – | no | yes |
| 520-203 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 2003-08-13 | yes | yes |
| 520-204 | Windstream PAETEC ITEL, LLC | 2003-12-04 | yes | yes |
| 520-205 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-206 | Lumen QWEST CORPORATION | – | no | yes |
| 520-207 | Comcast COMCAST IP PHONE, LLC | – | yes | yes |
| 520-209 | Lumen QWEST CORPORATION | – | no | yes |
| 520-214 | Onvoy ONVOY, LLC - AZ | 2015-11-19 | yes | yes |
| 520-218 | Lumen QWEST CORPORATION | – | no | yes |
| 520-219 | Lumen QWEST CORPORATION | – | no | yes |
| 520-222 | Lumen QWEST CORPORATION | 2011-10-06 | yes | yes |
| 520-225 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-228 | Lumen QWEST CORPORATION | – | no | yes |
| 520-229 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-230 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | yes | yes |
| 520-232 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-235 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-237 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-239 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | – | yes | yes |
| 520-240 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-241 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 520-243 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-244 | T-Mobile T-MOBILE USA, INC. | 2016-03-14 | yes | yes |
| 520-245 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 520-246 | Lumen LEVEL 3 COMMUNICATIONS, LLC - AZ | 2020-10-30 | yes | yes |
| 520-247 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-01-18 | no | yes |
| 520-248 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-250 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-256 | T-Mobile T-MOBILE USA, INC. | 2001-01-29 | yes | yes |
| 520-257 | T-Mobile T-MOBILE USA, INC. | 2014-08-19 | yes | yes |
| 520-258 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-259 | NORTH COUNTY COMMUNICATIONS CORPORATION | – | no | yes |
| 520-260 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | yes | yes |
| 520-261 | Bandwidth BANDWIDTH.COM CLEC, LLC - AZ | 2009-07-16 | yes | yes |
| 520-262 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2010-02-17 | yes | yes |
| 520-268 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2013-03-14 | yes | yes |
| 520-269 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2007-02-05 | yes | yes |
| 520-270 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 520-271 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-272 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 520-273 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2014-08-19 | yes | yes |
| 520-274 | T-Mobile T-MOBILE USA, INC. | 2016-09-14 | yes | yes |
| 520-275 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 520-276 | Bandwidth BANDWIDTH.COM CLEC, LLC - AZ | 2014-10-30 | yes | yes |
| 520-278 | T-Mobile METROPCS, INC. | 2014-08-28 | yes | yes |
| 520-279 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2014-02-18 | yes | yes |
| 520-282 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | yes | yes |
| 520-283 | T-Mobile T-MOBILE USA, INC. | 2014-09-23 | yes | yes |
| 520-284 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 2009-03-17 | yes | yes |
| 520-286 | T-Mobile T-MOBILE USA, INC. | 2013-01-11 | yes | yes |
| 520-288 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2011-04-21 | yes | yes |
| 520-289 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2006-06-28 | yes | yes |
| 520-290 | Lumen QWEST CORPORATION | – | no | yes |
| 520-291 | Lumen QWEST CORPORATION | – | no | yes |
| 520-292 | Lumen QWEST CORPORATION | – | no | yes |
| 520-293 | Lumen QWEST CORPORATION | – | no | yes |
| 520-294 | Lumen QWEST CORPORATION | – | no | yes |
| 520-295 | Lumen QWEST CORPORATION | – | no | yes |
| 520-296 | Lumen QWEST CORPORATION | – | no | yes |
| 520-297 | Lumen QWEST CORPORATION | – | no | yes |
| 520-298 | Lumen QWEST CORPORATION | – | no | yes |
| 520-299 | Lumen QWEST CORPORATION | – | no | yes |
| 520-300 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2007-03-22 | yes | yes |
| 520-301 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2007-05-03 | yes | yes |
| 520-302 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2007-02-12 | yes | yes |
| 520-303 | Onvoy ONVOY, LLC - AZ | 2008-01-02 | yes | yes |
| 520-304 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 520-305 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2007-10-09 | yes | yes |
| 520-306 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2009-03-12 | yes | yes |
| 520-307 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-308 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2009-09-09 | yes | yes |
| 520-309 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2005-09-30 | yes | yes |
| 520-310 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2009-09-09 | yes | yes |
| 520-312 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 520-314 | Lumen LEVEL 3 COMMUNICATIONS, LLC - AZ | 2011-02-09 | yes | yes |
| 520-318 | Lumen QWEST CORPORATION | – | no | yes |
| 520-319 | Lumen QWEST CORPORATION | – | no | yes |
| 520-320 | Lumen QWEST CORPORATION | – | no | yes |
| 520-321 | Lumen QWEST CORPORATION | – | no | yes |
| 520-322 | Lumen QWEST CORPORATION | – | no | yes |
| 520-323 | Lumen QWEST CORPORATION | – | no | yes |
| 520-324 | Lumen QWEST CORPORATION | – | no | yes |
| 520-325 | Lumen QWEST CORPORATION | – | no | yes |
| 520-326 | Lumen QWEST CORPORATION | – | no | yes |
| 520-327 | Lumen QWEST CORPORATION | – | no | yes |
| 520-328 | Lumen QWEST CORPORATION | 2014-05-14 | yes | yes |
| 520-329 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 2010-06-28 | yes | yes |
| 520-330 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2016-07-06 | yes | yes |
| 520-331 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 520-332 | T-Mobile T-MOBILE USA, INC. | 2012-05-17 | yes | yes |
| 520-333 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 2010-12-17 | yes | yes |
| 520-334 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2008-10-02 | yes | yes |
| 520-336 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2009-02-13 | yes | yes |
| 520-338 | Onvoy ONVOY, LLC - AZ | 2011-10-07 | yes | yes |
| 520-339 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2008-09-12 | yes | yes |
| 520-342 | Onvoy ONVOY, LLC - AZ | 2007-03-08 | yes | yes |
| 520-343 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2007-05-23 | yes | yes |
| 520-344 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2007-04-24 | yes | yes |
| 520-345 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2013-01-11 | yes | yes |
| 520-347 | Telnyx TELNYX LLC | – | yes | yes |
| 520-349 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-351 | Lumen LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | 2005-10-11 | yes | yes |
| 520-352 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | yes | yes |
| 520-354 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2016-10-27 | yes | yes |
| 520-355 | Bandwidth BANDWIDTH.COM CLEC, LLC - AZ | 2012-09-07 | yes | yes |
| 520-358 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-03-06 | no | yes |
| 520-359 | T-Mobile METROPCS, INC. | 2014-06-24 | yes | yes |
| 520-360 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 520-365 | T-Mobile T-MOBILE USA, INC. | 2012-04-24 | yes | yes |
| 520-367 | Charter ONVOY SPECTRUM, LLC | 2017-07-13 | yes | yes |
| 520-369 | Lumen LEVEL 3 COMMUNICATIONS, LLC - AZ | 2011-09-28 | yes | yes |
| 520-370 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-372 | Comcast COMCAST IP PHONE, LLC | 2019-08-05 | yes | yes |
| 520-373 | T-Mobile T-MOBILE USA, INC. | 2012-10-31 | yes | yes |
| 520-382 | Lumen LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | – | yes | yes |
| 520-388 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-389 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2014-10-09 | yes | yes |
| 520-390 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-392 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2009-12-29 | yes | yes |
| 520-393 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-395 | Comcast COMCAST IP PHONE, LLC | 2007-05-21 | yes | yes |
| 520-396 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2006-08-24 | yes | yes |
| 520-398 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-399 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-400 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-401 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-403 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-404 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-405 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-406 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-16 | no | yes |
| 520-407 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-408 | Lumen QWEST CORPORATION | – | no | yes |
| 520-409 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 520-410 | Lumen QWEST CORPORATION | – | no | yes |
| 520-416 | EXIANT COMMUNICATIONS LLC | 2019-09-16 | yes | yes |
| 520-419 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-420 | HD CARRIER LLC | 2019-12-18 | yes | yes |
| 520-425 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2006-11-03 | yes | yes |
| 520-427 | T-Mobile T-MOBILE USA, INC. | 2013-01-11 | yes | yes |
| 520-428 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2014-01-17 | yes | yes |
| 520-429 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | yes | yes |
| 520-433 | Lumen LEVEL 3 COMMUNICATIONS, LLC - AZ | 2012-11-20 | yes | yes |
| 520-434 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-437 | XO ARIZONA, INC. | 2006-03-30 | yes | yes |
| 520-440 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 520-441 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2010-04-20 | yes | yes |
| 520-443 | T-Mobile T-MOBILE USA, INC. | 2007-06-06 | yes | yes |
| 520-444 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-445 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 520-446 | Spok SPOK, INC. | – | no | yes |
| 520-447 | Onvoy ONVOY, LLC - AZ | 2014-02-28 | yes | yes |
| 520-448 | Peerless PEERLESS NETWORK OF ARIZONA, LLC - AZ | 2014-04-30 | yes | yes |
| 520-449 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | yes | yes |
| 520-451 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2021-10-28 | yes | yes |
| 520-460 | T-Mobile T-MOBILE USA, INC. | 2012-09-17 | yes | yes |
| 520-461 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | yes | yes |
| 520-462 | Onvoy ONVOY, LLC - AZ | 2017-08-17 | yes | yes |
| 520-465 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 520-467 | Onvoy ONVOY, LLC - AZ | 2019-12-19 | yes | yes |
| 520-468 | Onvoy ONVOY, LLC - AZ | 2008-05-21 | yes | yes |
| 520-469 | Lumen QWEST CORPORATION | – | no | yes |
| 520-471 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-474 | T-Mobile T-MOBILE USA, INC. | 2012-11-16 | yes | yes |
| 520-475 | CSC WIRELESS, LLC | 2020-06-05 | yes | yes |
| 520-476 | NUSO, LLC | 2020-09-01 | yes | yes |
| 520-477 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 2011-01-12 | yes | yes |
| 520-479 | T-Mobile T-MOBILE USA, INC. | 2020-05-11 | yes | yes |
| 520-481 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 520-482 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2021-07-01 | yes | yes |
| 520-484 | NUSO, LLC | 2012-10-22 | yes | yes |
| 520-485 | Bandwidth BANDWIDTH.COM CLEC, LLC - AZ | 2015-05-13 | yes | yes |
| 520-486 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2020-09-16 | yes | yes |
| 520-488 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-489 | Lumen QWEST CORPORATION | – | no | yes |
| 520-490 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-492 | Comcast COMCAST IP PHONE, LLC | 2020-10-06 | yes | yes |
| 520-493 | FIRSTDIGITAL TELECOM, LLC - UT | 2019-04-18 | yes | yes |
| 520-495 | Lumen LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | – | yes | yes |
| 520-496 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2020-10-07 | yes | yes |
| 520-497 | Bandwidth BANDWIDTH.COM CLEC, LLC - AZ | 2020-10-07 | yes | yes |
| 520-498 | Lumen QWEST CORPORATION | – | no | yes |
| 520-499 | T-Mobile T-MOBILE USA, INC. | 2013-04-19 | yes | yes |
| 520-500 | Onvoy ONVOY, LLC - AZ | 2015-02-26 | yes | yes |
| 520-501 | Twilio TWILIO INTERNATIONAL, INC. | 2020-10-22 | yes | yes |
| 520-505 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 2009-07-20 | yes | yes |
| 520-512 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-513 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-514 | Lumen QWEST CORPORATION | – | no | yes |
| 520-516 | Lumen QWEST CORPORATION | – | no | yes |
| 520-519 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-524 | Onvoy ONVOY, LLC - AZ | 2020-12-21 | yes | yes |
| 520-526 | COMMIO, LLC | 2017-04-28 | yes | yes |
| 520-528 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2015-01-19 | yes | yes |
| 520-529 | Lumen QWEST CORPORATION | – | no | yes |
| 520-530 | Onvoy ONVOY, LLC - AZ | 2020-10-02 | yes | yes |
| 520-531 | Lumen QWEST CORPORATION | – | no | yes |
| 520-534 | T-Mobile T-MOBILE USA, INC. | 2021-01-11 | yes | yes |
| 520-535 | T-Mobile T-MOBILE USA, INC. | 2020-12-08 | yes | yes |
| 520-537 | IP HORIZON LLC | 2021-03-04 | yes | yes |
| 520-539 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2014-04-09 | yes | yes |
| 520-540 | Bandwidth BANDWIDTH.COM CLEC, LLC - AZ | 2022-12-15 | yes | yes |
| 520-542 | Lumen LEVEL 3 COMMUNICATIONS, LLC - AZ | 2021-08-04 | yes | yes |
| 520-543 | T-Mobile T-MOBILE USA, INC. | 2021-05-14 | yes | yes |
| 520-544 | Lumen QWEST CORPORATION | – | no | yes |
| 520-545 | Lumen LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | – | no | yes |
| 520-546 | Lumen QWEST CORPORATION | – | no | yes |
| 520-547 | Lumen LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | – | no | yes |
| 520-548 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-07-19 | no | yes |
| 520-549 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | yes | yes |
| 520-551 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-11-19 | no | yes |
| 520-554 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2021-08-09 | yes | yes |
| 520-561 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | yes | yes |
| 520-565 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2021-08-09 | yes | yes |
| 520-566 | Lumen QWEST CORPORATION | – | no | yes |
| 520-570 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-571 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-572 | Lumen QWEST CORPORATION | – | no | yes |
| 520-573 | Lumen QWEST CORPORATION | – | no | yes |
| 520-574 | Lumen QWEST CORPORATION | – | no | yes |
| 520-575 | Lumen QWEST CORPORATION | – | no | yes |
| 520-576 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-577 | Lumen QWEST CORPORATION | – | no | yes |
| 520-578 | Lumen QWEST CORPORATION | – | no | yes |
| 520-579 | Lumen QWEST CORPORATION | – | no | yes |
| 520-584 | Lumen QWEST CORPORATION | – | no | yes |
| 520-585 | T-Mobile METROPCS, INC. | 2016-03-09 | yes | yes |
| 520-589 | Lumen LEVEL 3 COMMUNICATIONS, LLC - AZ | 2015-07-29 | yes | yes |
| 520-591 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-594 | WAVENATION, LLC | – | yes | yes |
| 520-596 | T-Mobile T-MOBILE USA, INC. | 2021-10-26 | yes | yes |
| 520-599 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2014-12-15 | yes | yes |
| 520-600 | Onvoy ONVOY, LLC - AZ | 2017-10-10 | yes | yes |
| 520-602 | Charter ONVOY SPECTRUM, LLC | 2023-08-17 | yes | yes |
| 520-603 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-605 | Bandwidth BANDWIDTH.COM CLEC, LLC - AZ | 2021-10-25 | yes | yes |
| 520-606 | T-Mobile METROPCS, INC. | 2014-02-05 | yes | yes |
| 520-609 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | yes | yes |
| 520-612 | Bandwidth BANDWIDTH.COM CLEC, LLC - AZ | 2012-05-22 | yes | yes |
| 520-613 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2022-01-07 | yes | yes |
| 520-614 | Onvoy ONVOY, LLC - AZ | 2022-02-24 | yes | yes |
| 520-615 | Lumen QWEST CORPORATION | – | no | yes |
| 520-616 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-617 | Lumen QWEST CORPORATION | – | no | yes |
| 520-618 | Lumen LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | – | yes | yes |
| 520-620 | Lumen QWEST CORPORATION | – | no | yes |
| 520-621 | Lumen QWEST CORPORATION | – | no | yes |
| 520-622 | Lumen QWEST CORPORATION | – | no | yes |
| 520-623 | Lumen QWEST CORPORATION | – | no | yes |
| 520-624 | Lumen QWEST CORPORATION | – | no | yes |
| 520-625 | Lumen QWEST CORPORATION | – | no | yes |
| 520-626 | Lumen QWEST CORPORATION | – | no | yes |
| 520-627 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2022-01-18 | yes | yes |
| 520-628 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-629 | Lumen QWEST CORPORATION | – | no | yes |
| 520-631 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-633 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2022-01-08 | yes | yes |
| 520-638 | Lumen QWEST CORPORATION | 2008-04-28 | yes | yes |
| 520-639 | Lumen CENTURYLINK COMMUNICATIONS, LLC | 2015-04-17 | yes | yes |
| 520-640 | Lumen LEVEL 3 COMMUNICATIONS, LLC - AZ | 2022-04-15 | yes | yes |
| 520-647 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-648 | Lumen QWEST CORPORATION | – | no | yes |
| 520-649 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2022-08-10 | yes | yes |
| 520-651 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2022-07-14 | yes | yes |
| 520-653 | Bandwidth BANDWIDTH.COM CLEC, LLC - AZ | 2022-07-20 | yes | yes |
| 520-658 | T-Mobile T-MOBILE USA, INC. | 2014-10-24 | yes | yes |
| 520-661 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-662 | Lumen QWEST CORPORATION | 2004-06-11 | yes | yes |
| 520-663 | Lumen QWEST CORPORATION | – | no | yes |
| 520-664 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-665 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-667 | NUSO, LLC | 2023-02-13 | yes | yes |
| 520-668 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2002-05-08 | yes | yes |
| 520-670 | Lumen QWEST CORPORATION | – | no | yes |
| 520-675 | Dish BOOST SUBSCRIBERCO L.L.C. | 2023-04-14 | yes | yes |
| 520-682 | Lumen QWEST CORPORATION | – | no | yes |
| 520-690 | Lumen QWEST CORPORATION | – | no | yes |
| 520-694 | Lumen LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | – | no | yes |
| 520-695 | Lumen QWEST CORPORATION | – | no | yes |
| 520-696 | Lumen QWEST CORPORATION | – | no | yes |
| 520-697 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2023-09-06 | yes | yes |
| 520-703 | CALLWORKS CORPORATION | 2023-12-08 | yes | yes |
| 520-704 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2010-02-09 | yes | yes |
| 520-710 | Charter ONVOY SPECTRUM, LLC | 2022-08-10 | yes | yes |
| 520-712 | Lumen QWEST CORPORATION | – | no | yes |
| 520-719 | Bandwidth BANDWIDTH.COM CLEC, LLC - AZ | 2015-07-23 | yes | yes |
| 520-721 | Lumen QWEST CORPORATION | – | no | yes |
| 520-722 | Lumen QWEST CORPORATION | – | no | yes |
| 520-724 | Lumen QWEST CORPORATION | 2011-02-02 | yes | yes |
| 520-729 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2014-10-17 | yes | yes |
| 520-730 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | yes | yes |
| 520-731 | Lumen QWEST CORPORATION | – | no | yes |
| 520-733 | Lumen QWEST CORPORATION | – | no | yes |
| 520-734 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2024-03-01 | yes | yes |
| 520-738 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2024-10-22 | yes | yes |
| 520-739 | Charter ONVOY SPECTRUM, LLC | 2024-11-14 | yes | yes |
| 520-740 | Lumen QWEST CORPORATION | – | no | yes |
| 520-741 | Lumen QWEST CORPORATION | – | no | yes |
| 520-742 | Lumen QWEST CORPORATION | – | no | yes |
| 520-743 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-744 | Lumen QWEST CORPORATION | – | no | yes |
| 520-745 | Lumen QWEST CORPORATION | – | no | yes |
| 520-746 | Lumen QWEST CORPORATION | – | no | yes |
| 520-747 | Lumen QWEST CORPORATION | – | no | yes |
| 520-748 | Lumen QWEST CORPORATION | – | no | yes |
| 520-749 | Lumen QWEST CORPORATION | – | no | yes |
| 520-750 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-751 | Lumen QWEST CORPORATION | – | no | yes |
| 520-753 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2025-01-31 | yes | yes |
| 520-756 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2025-03-18 | yes | yes |
| 520-760 | Lumen QWEST CORPORATION | – | no | yes |
| 520-762 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-770 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-771 | Vonage VONAGE AMERICA LLC | 2017-12-20 | yes | yes |
| 520-775 | Bandwidth BANDWIDTH.COM CLEC, LLC - AZ | 2014-02-28 | yes | yes |
| 520-777 | Lumen LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | 2004-10-27 | yes | yes |
| 520-780 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | yes | yes |
| 520-783 | T-Mobile METROPCS, INC. | 2019-02-05 | yes | yes |
| 520-784 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-785 | ALLO COMMUNICATIONS LLC | 2025-10-22 | yes | yes |
| 520-789 | T-Mobile T-MOBILE USA, INC. | 2012-02-24 | yes | yes |
| 520-790 | Lumen QWEST CORPORATION | – | no | yes |
| 520-791 | Lumen QWEST CORPORATION | – | no | yes |
| 520-792 | Lumen QWEST CORPORATION | – | no | yes |
| 520-793 | Lumen QWEST CORPORATION | – | no | yes |
| 520-794 | Lumen QWEST CORPORATION | – | no | yes |
| 520-795 | Lumen QWEST CORPORATION | – | no | yes |
| 520-797 | Lumen QWEST CORPORATION | – | no | yes |
| 520-798 | Lumen QWEST CORPORATION | – | no | yes |
| 520-799 | Lumen QWEST CORPORATION | – | no | yes |
| 520-800 | Onvoy ONVOY, LLC - AZ | 2015-01-28 | yes | yes |
| 520-801 | WIDE VOICE, LLC - AZ | 2025-04-18 | yes | yes |
| 520-802 | LEAP TELECOM, LLC | 2025-10-01 | yes | yes |
| 520-806 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-807 | Lumen QWEST CORPORATION | – | no | yes |
| 520-808 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-08-17 | no | yes |
| 520-809 | INTRADO COMMUNICATIONS, LLC | 2014-12-23 | yes | yes |
| 520-812 | Bandwidth BANDWIDTH.COM CLEC, LLC - AZ | 2011-04-19 | yes | yes |
| 520-815 | Bandwidth BANDWIDTH.COM CLEC, LLC - AZ | 2015-03-10 | yes | yes |
| 520-818 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-820 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | yes | yes |
| 520-822 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-825 | Lumen QWEST CORPORATION | – | no | yes |
| 520-829 | Lumen LEVEL 3 COMMUNICATIONS, LLC - AZ | 2001-08-17 | yes | yes |
| 520-833 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | yes | yes |
| 520-834 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-10-17 | yes | yes |
| 520-837 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | – | yes | yes |
| 520-838 | Lumen QWEST CORPORATION | 2001-01-26 | yes | yes |
| 520-844 | Onvoy ONVOY, LLC - AZ | – | no | yes |
| 520-848 | T-Mobile METROPCS, INC. | 2015-01-19 | yes | yes |
| 520-849 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 2017-06-15 | yes | yes |
| 520-850 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-861 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-867 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-11-19 | yes | yes |
| 520-869 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-870 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-872 | Lumen QWEST CORPORATION | – | no | yes |
| 520-873 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-874 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-877 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-878 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-879 | Lumen QWEST CORPORATION | – | no | yes |
| 520-881 | Lumen QWEST CORPORATION | – | no | yes |
| 520-882 | Lumen QWEST CORPORATION | – | no | yes |
| 520-883 | Lumen QWEST CORPORATION | – | no | yes |
| 520-884 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-885 | Lumen QWEST CORPORATION | – | no | yes |
| 520-886 | Lumen QWEST CORPORATION | – | no | yes |
| 520-887 | Lumen QWEST CORPORATION | – | no | yes |
| 520-888 | Lumen QWEST CORPORATION | – | no | yes |
| 520-889 | Lumen QWEST CORPORATION | – | no | yes |
| 520-890 | 8x8 8X8, INC. | 2026-10-16 | yes | no |
| 520-891 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 520-900 | Onvoy ONVOY, LLC - AZ | 2015-08-13 | yes | yes |
| 520-901 | Lumen LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | – | yes | yes |
| 520-903 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-904 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | yes | yes |
| 520-906 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 520-907 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 520-908 | Lumen QWEST CORPORATION | – | yes | yes |
| 520-909 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-910 | Onvoy ONVOY, LLC - AZ | 2021-02-01 | yes | yes |
| 520-912 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2013-10-24 | yes | yes |
| 520-917 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | – | no | yes |
| 520-918 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | – | no | yes |
| 520-922 | AHOI LLC | 2026-03-09 | yes | yes |
| 520-934 | TON80 COMMUNICATIONS, LLC | 2021-04-06 | yes | yes |
| 520-940 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-954 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-955 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | yes | yes |
| 520-965 | T-Mobile T-MOBILE USA, INC. | 2015-01-02 | yes | yes |
| 520-971 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-975 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | – | no | yes |
| 520-977 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-979 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-981 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-982 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-989 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | yes | yes |
| 520-990 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-991 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 520-999 | Onvoy ONVOY, LLC - AZ | 2012-11-05 | yes | yes |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| QWEST CORPORATION | Lumen | 143 | 35.8% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | Verizon | 65 | 16.2% |
| T-MOBILE USA, INC. | T-Mobile | 47 | 11.8% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 41 | 10.2% |
| ONVOY, LLC - AZ | Onvoy | 18 | 4.5% |
| BANDWIDTH.COM CLEC, LLC - AZ | Bandwidth | 13 | 3.2% |
| LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | Lumen | 10 | 2.5% |
| LEVEL 3 COMMUNICATIONS, LLC - AZ | Lumen | 8 | 2% |
| METROPCS, INC. | T-Mobile | 6 | 1.5% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | Verizon | 4 | 1% |
| COMCAST IP PHONE, LLC | Comcast | 4 | 1% |
| ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | Allstream | 4 | 1% |
| ONVOY SPECTRUM, LLC | Charter | 4 | 1% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | AT&T | 3 | 0.8% |
| NUSO, LLC | – | 3 | 0.8% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 2 | 0.5% |
| PAETEC ITEL, LLC | Windstream | 1 | 0.2% |
| NORTH COUNTY COMMUNICATIONS CORPORATION | – | 1 | 0.2% |
| TELNYX LLC | Telnyx | 1 | 0.2% |
| EXIANT COMMUNICATIONS LLC | – | 1 | 0.2% |
| HD CARRIER LLC | – | 1 | 0.2% |
| XO ARIZONA, INC. | – | 1 | 0.2% |
| SPOK, INC. | Spok | 1 | 0.2% |
| PEERLESS NETWORK OF ARIZONA, LLC - AZ | Peerless | 1 | 0.2% |
| CSC WIRELESS, LLC | – | 1 | 0.2% |
| FIRSTDIGITAL TELECOM, LLC - UT | – | 1 | 0.2% |
| TWILIO INTERNATIONAL, INC. | Twilio | 1 | 0.2% |
| COMMIO, LLC | – | 1 | 0.2% |
| IP HORIZON LLC | – | 1 | 0.2% |
| WAVENATION, LLC | – | 1 | 0.2% |
| CENTURYLINK COMMUNICATIONS, LLC | Lumen | 1 | 0.2% |
| BOOST SUBSCRIBERCO L.L.C. | Dish | 1 | 0.2% |
| CALLWORKS CORPORATION | – | 1 | 0.2% |
| VONAGE AMERICA LLC | Vonage | 1 | 0.2% |
| ALLO COMMUNICATIONS LLC | – | 1 | 0.2% |
| WIDE VOICE, LLC - AZ | – | 1 | 0.2% |
| LEAP TELECOM, LLC | – | 1 | 0.2% |
| INTRADO COMMUNICATIONS, LLC | – | 1 | 0.2% |
| 8X8, INC. | 8x8 | 1 | 0.2% |
| AHOI LLC | – | 1 | 0.2% |
| TON80 COMMUNICATIONS, LLC | – | 1 | 0.2% |
Frequently asked
Which prefixes belong to TUCSON in area code 520?
400 blocks: 202, 203, 204, 205, 206, 207, 209, 214, 218, 219, 222, 225 and 388 more, all listed in the table above.
Which carriers have numbers in TUCSON?
QWEST CORPORATION (143 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ (65 blocks), T-MOBILE USA, INC. (47 blocks), NEW CINGULAR WIRELESS PCS, LLC (41 blocks), ONVOY, LLC - AZ (18 blocks), BANDWIDTH.COM CLEC, LLC - AZ (13 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is TUCSON a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.