All assignees
647 prefixes in 928 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 928-300 | SEDONA | 6572 | — | — |
| 928-301 | SEDONA | 6572 | — | — |
| 928-302 | LKHAVASUCY | 612K | — | Yes |
| 928-303 | KINGMAN | 5562 | 2001-05-31 | Yes |
| 928-304 | YUMA | 6572 | 2007-02-05 | Yes |
| 928-305 | YUMA | 9636 | — | — |
| 928-306 | SHOW LOW | 4146 | 2001-03-08 | — |
| 928-307 | PAGE | 630E | 2020-08-25 | Yes |
| 928-308 | PRESCOTT | 6572 | — | — |
| 928-309 | WINDOWROCK | 4146 | — | — |
| 928-310 | FLAGSTAFF | 6529 | 2004-09-22 | Yes |
| 928-311 | XXXXXXXXXX | MULT | — | — |
| 928-312 | INCRPTCNYN | 3285 | 2015-01-22 | Yes |
| 928-313 | HOLBROOK | 4146 | 2005-12-16 | — |
| 928-314 | YUMA | 9636 | — | — |
| 928-315 | SOMERTON | 6529 | 2007-09-07 | Yes |
| 928-316 | PIMA | 508J | 2015-06-05 | Yes |
| 928-317 | YUMA | 9636 | — | — |
| 928-318 | YUMA | 630E | 2014-06-04 | Yes |
| 928-319 | DILKON | 6010 | 2011-10-21 | Yes |
| 928-320 | PIMA | 6572 | 2022-06-01 | Yes |
| 928-321 | ST JOHNS | 4146 | 2005-12-20 | — |
| 928-322 | SAFFORD | 6572 | 2004-08-19 | — |
| 928-323 | SOMERTON | 3285 | 2012-05-18 | Yes |
| 928-324 | SAFFORD | 630E | — | Yes |
| 928-325 | SEDONA | 7217 | 2010-06-01 | Yes |
| 928-326 | FLAGSTAFF | 4146 | 2016-04-21 | Yes |
| 928-327 | PRESCOTT | 197D | 2018-12-03 | Yes |
| 928-328 | YUMA | 9636 | — | Yes |
| 928-329 | YUMA | 9636 | — | — |
| 928-330 | MESQUITCRK | 2200 | — | — |
| 928-331 | GILA BEND | 587F | 2015-06-29 | Yes |
| 928-332 | WHITERIVER | 4426 | — | Yes |
| 928-333 | SPRINGERVL | 4426 | — | — |
| 928-334 | WHITERIVER | 4426 | — | Yes |
| 928-335 | WHITERIVER | 4426 | — | Yes |
| 928-336 | YUMA | 9636 | — | Yes |
| 928-337 | ST JOHNS | 4426 | — | Yes |
| 928-338 | WHITERIVER | 4426 | — | Yes |
| 928-339 | ALPINE | 4426 | — | Yes |
| 928-340 | SEDONA | 7175 | — | Yes |
| 928-341 | YUMA | 9636 | — | Yes |
| 928-342 | YUMA | 9636 | — | — |
| 928-343 | YUMA | 9636 | — | — |
| 928-344 | YUMA | 9636 | — | — |
| 928-345 | YUMA | 9636 | — | Yes |
| 928-346 | AZ VILLAGE | 2200 | — | — |
| 928-347 | LITTLEFLD | 2356 | — | — |
| 928-348 | SAFFORD | 9636 | — | — |
| 928-349 | CHINLE | 4146 | 2006-03-28 | — |
| 928-350 | PRESCOTT | 7175 | — | Yes |
| 928-351 | GLOBE | 7175 | — | Yes |
| 928-352 | KINGMAN | 630E | 2019-05-28 | Yes |
| 928-353 | GREENEHVN | 2171 | — | Yes |
| 928-354 | MORMONLAKE | 2171 | — | Yes |
| 928-355 | MARBLECNYN | 2171 | — | Yes |
| 928-356 | PRESCOTT | 965H | 2019-09-13 | Yes |
| 928-357 | WINDOWROCK | 3285 | 2019-10-31 | Yes |
| 928-358 | PINETOP | 6572 | 2006-06-06 | Yes |
| 928-359 | DUNCAN | 2176 | — | — |
| 928-360 | CHINLE | 5736 | 2020-05-11 | Yes |
| 928-361 | PIMA | 587F | 2020-04-15 | Yes |
| 928-362 | SAFFORD | 7217 | 2012-06-22 | Yes |
| 928-363 | PAYSON | 6010 | 2010-10-15 | Yes |
| 928-364 | BLUE RIDGE | 630E | 2020-06-16 | Yes |
| 928-365 | GREENEHVN | 630E | 2020-06-16 | Yes |
| 928-366 | YUMA | 6572 | 2010-03-09 | Yes |
| 928-367 | PINETOP | 4426 | — | — |
| 928-368 | PINETOP | 4426 | — | Yes |
| 928-369 | PINETOP | 4426 | — | Yes |
| 928-370 | MARBLECNYN | 630E | 2020-06-16 | Yes |
| 928-371 | MORMONLAKE | 630E | 2020-06-16 | Yes |
| 928-372 | HARQUHLVLY | 2171 | — | Yes |
| 928-373 | YUMA | 9636 | — | Yes |
| 928-374 | WIKIEUP | 6572 | 2020-07-22 | Yes |
| 928-375 | SALOME | 6010 | 2022-05-10 | Yes |
| 928-376 | YUMA | 9636 | — | — |
| 928-377 | KINGMAN | 6010 | 2004-08-19 | Yes |
| 928-378 | ROOSEVLTLK | 630E | 2020-06-16 | Yes |
| 928-379 | PRESCOTT | 6572 | — | Yes |
| 928-380 | FLAGSTAFF | 6010 | — | — |
| 928-381 | GRANDCNYON | 630E | 2020-12-22 | Yes |
| 928-382 | SALOME | 630E | 2020-06-16 | Yes |
| 928-383 | CHINLE | 6010 | 2014-08-28 | Yes |
| 928-384 | SUPAI | 630E | 2020-06-16 | Yes |
| 928-385 | KINGMAN | 6572 | 2020-07-14 | Yes |
| 928-386 | WINSLOW | 6572 | — | Yes |
| 928-387 | SAFFORD | 9636 | 2008-03-20 | Yes |
| 928-388 | YUMA | 6529 | — | Yes |
| 928-389 | EHRENBERG | 630E | — | Yes |
| 928-390 | SOMERTON | 6572 | 2022-03-09 | Yes |
| 928-391 | KINGMAN | 3285 | 2020-07-28 | Yes |
| 928-392 | LKHAVASUCY | 6572 | 2020-08-03 | Yes |
| 928-393 | PIMA | 630E | 2020-12-22 | Yes |
| 928-394 | BOUSE | 630E | 2020-12-22 | Yes |
| 928-395 | FLAGSTAFF | 630E | — | — |
| 928-396 | FLAGSTAFF | 630E | — | — |
| 928-397 | CASTLEROCK | 630E | 2020-12-23 | Yes |
| 928-398 | SOMERTON | 630E | 2020-12-08 | Yes |
| 928-399 | SEDONA | 6529 | 2002-01-29 | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.