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
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 307-340 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | LUSK | WY | |
| 307-341 | PROJECT TEL. CO., INC. | 2250 | SOUTHWYOLA | WY | |
| 307-342 | ONVOY, LLC - WY | 450F | JACKSON | WY | |
| 307-344 | QWEST CORPORATION | 9636 | MAMMOTH | WY | |
| 307-345 | UNION TELEPHONE COMPANY | 013B | LANDER | WY | |
| 307-347 | RT COMMUNICATIONS | 3410 | WORLAND | WY | |
| 307-348 | UNION TEL. CO. | 2297 | HANNA | WY | |
| 307-349 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | LANDER | WY | |
| 307-350 | UNION TELEPHONE COMPANY | 013B | ROCK SPG | WY | |
| 307-351 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DOUGLAS | WY | |
| 307-352 | QWEST CORPORATION | 9636 | ROCK SPG | WY | |
| 307-353 | COLUMBINE TELCO DBA SILVER STAR COMMUNICATIONS | 2214 | ALTA | WY | |
| 307-356 | UNION TEL. CO. | 2297 | SHIRLEBSIN | WY | |
| 307-358 | QWEST CORPORATION | 9636 | DOUGLAS | WY | |
| 307-359 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | DOUGLAS | WY | |
| 307-360 | UNION TELEPHONE COMPANY | 013B | PINEDALE | WY | |
| 307-362 | QWEST CORPORATION | 9636 | ROCK SPG | WY | |
| 307-366 | TRI-COUNTY TEL. ASSN., INC. | 2296 | TEN SLEEP | WY | |
| 307-367 | CENTURYTEL OF WYOMING, INC. DBA CENTURYLINK | 2299 | PINEDALE | WY | |
| 307-370 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | RAWLINS | WY | |
| 307-371 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | ROCK SPG | WY | |
| 307-373 | BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] | 009E | GREYBULL | WY | |
| 307-374 | VONAGE AMERICA LLC | 197D | ROCK SPG | WY | |
| 307-375 | RT COMMUNICATIONS | 3410 | WORLAND | WY | |
| 307-377 | UNION TELEPHONE COMPANY | 013B | CASPER | WY | |
| 307-378 | UNION TEL. CO. | 2297 | ROCK RIVER | WY | |
| 307-379 | CENTURYTEL OF WYOMING, INC. DBA CENTURYLINK | 2299 | MEDICINBOW | WY | |
| 307-380 | UNION TELEPHONE COMPANY | 013B | BAGGS | WY | |
| 307-382 | QWEST CORPORATION | 9636 | ROCK SPG | WY | |
| 307-383 | DUBOIS TEL. EXCH., INC. | 2291 | BAGGS | WY | |
| 307-386 | UNION TEL. CO. | 2297 | LABARGE | WY | |
| 307-388 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WORLAND | WY | |
| 307-389 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | ROCK SPG | WY | |
| 307-390 | UNION TELEPHONE COMPANY | 013B | LABARGE | WY | |
| 307-401 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TORRINGTON | WY | |
| 307-406 | WY | ||||
| 307-411 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WY | |
| 307-417 | ONVOY, LLC - WY | 450F | RAWLINS | WY | |
| 307-421 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CHEYENNE | WY | |
| 307-422 | CHUGWATER TEL. CO. | 2289 | CHUGWATER | WY | |
| 307-431 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | WORLAND | WY | |
| 307-432 | QWEST CORPORATION | 9636 | CHEYENNE | WY | |
| 307-433 | QWEST CORPORATION | 9636 | CHEYENNE | WY | |
| 307-436 | QWEST CORPORATION | 9636 | GLENROCK | WY | |
| 307-437 | RT COMMUNICATIONS | 3410 | MIDWEST | WY | |
| 307-439 | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | CASPER | WY | |
| 307-440 | BRESNAN BROADBAND OF WYOMING, LLC - WY [CHARTER] | 009E | BASIN | WY | |
| 307-441 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CASPER | WY | |
| 307-444 | ALL WEST/WYOMING, INC. | 3880 | EVANSTON | WY | |
| 307-449 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ROCK SPG | 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.