NumberResearchRecent prefix assignments
371 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.
Most active assignees, last 30 days
New assignments by month
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 928-334 | CITIZENS TELECOM CO OF WHITE MOUNTAINS INC. | 4426 | WHITERIVER | AZ | |
| 928-335 | CITIZENS TELECOM CO OF WHITE MOUNTAINS INC. | 4426 | WHITERIVER | AZ | |
| 928-336 | QWEST CORPORATION | 9636 | YUMA | AZ | |
| 928-337 | CITIZENS TELECOM CO OF WHITE MOUNTAINS INC. | 4426 | ST JOHNS | AZ | |
| 928-338 | CITIZENS TELECOM CO OF WHITE MOUNTAINS INC. | 4426 | WHITERIVER | AZ | |
| 928-339 | CITIZENS TELECOM CO OF WHITE MOUNTAINS INC. | 4426 | ALPINE | AZ | |
| 928-340 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7175 | SEDONA | AZ | |
| 928-341 | QWEST CORPORATION | 9636 | YUMA | AZ | |
| 928-342 | QWEST CORPORATION | 9636 | YUMA | AZ | |
| 928-343 | QWEST CORPORATION | 9636 | YUMA | AZ | |
| 928-344 | QWEST CORPORATION | 9636 | YUMA | AZ | |
| 928-345 | QWEST CORPORATION | 9636 | YUMA | AZ | |
| 928-346 | FORT MOJAVE TELECOM INC | 2200 | AZ VILLAGE | AZ | |
| 928-347 | RIO VIRGIN TEL. CO., INC. | 2356 | LITTLEFLD | AZ | |
| 928-348 | QWEST CORPORATION | 9636 | SAFFORD | AZ | |
| 928-350 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7175 | PRESCOTT | AZ | |
| 928-351 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7175 | GLOBE | AZ | |
| 928-353 | ARIZONA TEL. CO. | 2171 | GREENEHVN | AZ | |
| 928-354 | ARIZONA TEL. CO. | 2171 | MORMONLAKE | AZ | |
| 928-355 | ARIZONA TEL. CO. | 2171 | MARBLECNYN | AZ | |
| 928-359 | VALLEY TEL COOP INC | 2176 | DUNCAN | AZ | |
| 928-367 | CITIZENS TELECOM CO OF WHITE MOUNTAINS INC. | 4426 | PINETOP | AZ | |
| 928-368 | CITIZENS TELECOM CO OF WHITE MOUNTAINS INC. | 4426 | PINETOP | AZ | |
| 928-369 | CITIZENS TELECOM CO OF WHITE MOUNTAINS INC. | 4426 | PINETOP | AZ | |
| 928-372 | ARIZONA TEL. CO. | 2171 | HARQUHLVLY | AZ | |
| 928-373 | QWEST CORPORATION | 9636 | YUMA | AZ | |
| 928-376 | QWEST CORPORATION | 9636 | YUMA | AZ | |
| 928-379 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PRESCOTT | AZ | |
| 928-380 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FLAGSTAFF | AZ | |
| 928-386 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WINSLOW | AZ | |
| 928-388 | T-MOBILE USA, INC. | 6529 | YUMA | AZ | |
| 928-389 | ONVOY, LLC - AZ | 630E | EHRENBERG | AZ | |
| 928-395 | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ | |
| 928-396 | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ | |
| 928-402 | QWEST CORPORATION | 9636 | GLOBE | AZ | |
| 928-404 | CSC VOICE, LLC | 612K | BULLHDCYN | AZ | |
| 928-411 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | AZ | |
| 928-414 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | HOLBROOK | AZ | |
| 928-422 | TABLE TOP TELEPHONE COMPANY | 3334 | SELIGMAN | AZ | |
| 928-425 | QWEST CORPORATION | 9636 | GLOBE | AZ | |
| 928-427 | QWEST CORPORATION | 9636 | WICKENBURG | AZ | |
| 928-428 | QWEST CORPORATION | 9636 | SAFFORD | AZ | |
| 928-433 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7175 | FLAGSTAFF | AZ | |
| 928-436 | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | GILA BEND | AZ | |
| 928-437 | ONVOY, LLC - AZ | 630E | GRANDCNYON | AZ | |
| 928-441 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7175 | PRESCOTT | AZ | |
| 928-442 | QWEST CORPORATION | 9636 | PRESCOTT | AZ | |
| 928-443 | QWEST CORPORATION | 9636 | PRESCOTT | AZ | |
| 928-444 | CSC VOICE, LLC | 612K | BULLHEADCY | AZ | |
| 928-445 | QWEST CORPORATION | 9636 | PRESCOTT | AZ |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.