NumberResearchRecent prefix assignments
369 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026
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
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| 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 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.