NumberResearchRecent prefix assignments
369 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04
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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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 307-450 | UNION TELEPHONE COMPANY | 013B | DUBOIS | WY | |
| 307-455 | DUBOIS TEL. EXCH., INC. | 2291 | DUBOIS | WY | |
| 307-457 | RT COMMUNICATIONS | 3410 | GAS HILLS | WY | |
| 307-464 | QWEST CORPORATION | 9636 | WRIGHT | WY | |
| 307-465 | RT COMMUNICATIONS | 3410 | NEWCASTLE | WY | |
| 307-466 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | GREENRIVER | WY | |
| 307-467 | RT COMMUNICATIONS | 3410 | HULETT | WY | |
| 307-468 | RT COMMUNICATIONS | 3410 | UPTON | WY | |
| 307-469 | TRI-COUNTY TEL. ASSN., INC. | 2296 | HYATTVILLE | WY | |
| 307-470 | WY | ||||
| 307-472 | QWEST CORPORATION | 9636 | CASPER | WY | |
| 307-473 | QWEST CORPORATION | 9636 | CASPER | WY | |
| 307-477 | UNION TELEPHONE COMPANY | 013B | CHEYENNE | WY | |
| 307-486 | DUBOIS TEL. EXCH., INC. | 2291 | CROWHEART | WY | |
| 307-497 | ALL WEST COMMUNICATIONS - WY | 2290 | EVANSTON | WY | |
| 307-511 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WY | |
| 307-514 | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY | |
| 307-520 | UNION TELEPHONE COMPANY | 013B | MEDICINBOW | WY | |
| 307-527 | QWEST CORPORATION | 9636 | CODY | WY | |
| 307-532 | UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY | 4531 | TORRINGTON | WY | |
| 307-534 | UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY | 4531 | TORRINGTON | WY | |
| 307-536 | WY | ||||
| 307-537 | CENTURYTEL OF WYOMING, INC. DBA CENTURYLINK | 2299 | PINEDALE | WY | |
| 307-540 | UNION TELEPHONE COMPANY | 013B | JEFFREY CY | WY | |
| 307-541 | UNION TELEPHONE COMPANY | 013B | MORAN | WY | |
| 307-543 | QWEST CORPORATION | 9636 | MORAN | WY | |
| 307-544 | RT COMMUNICATIONS | 3410 | JEFFREY CY | WY | |
| 307-545 | QWEST CORPORATION | 9636 | OLDFATHFUL | WY | |
| 307-547 | RT COMMUNICATIONS | 3410 | BURNS | WY | |
| 307-548 | TRI-COUNTY TEL. ASSN., INC. | 2296 | LOVELL | WY | |
| 307-549 | UNION TELEPHONE COMPANY | 013B | OLDFATHFUL | WY | |
| 307-554 | ONVOY, LLC - WY | 450F | GLENROCK | WY | |
| 307-555 | MULTIPLE OCN LISTING | MULT | DIR ASST | WY | |
| 307-558 | WY | ||||
| 307-559 | WY | ||||
| 307-567 | UNION TELEPHONE COMPANY | 013B | GILLETTE | WY | |
| 307-568 | TRI-COUNTY TEL. ASSN., INC. | 2296 | BASIN | WY | |
| 307-576 | COLUMBINE TELCO DBA SILVER STAR COMMUNICATIONS | 2214 | LEIGHCNYON | WY | |
| 307-577 | QWEST CORPORATION | 9636 | CASPER | WY | |
| 307-578 | QWEST CORPORATION | 9636 | CODY | WY | |
| 307-587 | QWEST CORPORATION | 9636 | CODY | WY | |
| 307-600 | UNION TELEPHONE COMPANY | 013B | COKEVILLE | WY | |
| 307-605 | WY | ||||
| 307-611 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WY | |
| 307-620 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | BUFFALO | WY | |
| 307-621 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | BUFFALO | WY | |
| 307-630 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CHEYENNE | WY | |
| 307-631 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CHEYENNE | WY | |
| 307-632 | QWEST CORPORATION | 9636 | CHEYENNE | WY | |
| 307-633 | QWEST CORPORATION | 9636 | CHEYENNE | WY |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 2026-04 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.