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
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 307-751 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SHERIDAN | WY | |
| 307-752 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | SHERIDAN | WY | |
| 307-754 | QWEST CORPORATION | 9636 | POWELL | WY | |
| 307-755 | QWEST CORPORATION | 9636 | LARAMIE | WY | |
| 307-756 | RT COMMUNICATIONS | 3410 | MOORCROFT | WY | |
| 307-757 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CHEYENNE | WY | |
| 307-758 | RANGE TEL COOP INC | 2251 | CLEARMONT | WY | |
| 307-760 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | LARAMIE | WY | |
| 307-761 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LARAMIE | WY | |
| 307-762 | TRI-COUNTY TEL. ASSN., INC. | 2296 | BURLINGTON | WY | |
| 307-763 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | SHERIDAN | WY | |
| 307-765 | TRI-COUNTY TEL. ASSN., INC. | 2296 | GREYBULL | WY | |
| 307-766 | QWEST CORPORATION | 9636 | LARAMIE | WY | |
| 307-771 | QWEST CORPORATION | 9636 | CHEYENNE | WY | |
| 307-772 | QWEST CORPORATION | 9636 | CHEYENNE | WY | |
| 307-773 | QWEST CORPORATION | 9636 | CHEYENNE | WY | |
| 307-775 | QWEST CORPORATION | 9636 | CHEYENNE | WY | |
| 307-777 | QWEST CORPORATION | 9636 | CHEYENNE | WY | |
| 307-778 | QWEST CORPORATION | 9636 | CHEYENNE | WY | |
| 307-780 | UNION TELEPHONE COMPANY | 013B | MT VIEW | WY | |
| 307-782 | UNION TEL. CO. | 2297 | MT VIEW | WY | |
| 307-783 | QWEST CORPORATION | 9636 | EVANSTON | WY | |
| 307-786 | UNION TEL. CO. | 2297 | URIE | WY | |
| 307-787 | UNION TEL. CO. | 2297 | LYMAN | WY | |
| 307-788 | UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY | 4531 | WEST LYMAN | WY | |
| 307-789 | QWEST CORPORATION | 9636 | EVANSTON | WY | |
| 307-799 | UNION TELEPHONE COMPANY | 013B | EVANSTON | WY | |
| 307-811 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WY | |
| 307-828 | QWEST CORPORATION | 9636 | KEMMERER | WY | |
| 307-834 | UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY | 4531 | LA GRANGE | WY | |
| 307-836 | UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY | 4531 | GUERNSEY | WY | |
| 307-837 | UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY | 4531 | LINGLE | WY | |
| 307-840 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | RIVERTON | WY | |
| 307-849 | QWEST CORPORATION | 9636 | BORDER | WY | |
| 307-850 | UNION TELEPHONE COMPANY | 013B | RIVERTON | WY | |
| 307-851 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | RIVERTON | WY | |
| 307-855 | QWEST CORPORATION | 9636 | RIVERTON | WY | |
| 307-856 | QWEST CORPORATION | 9636 | RIVERTON | WY | |
| 307-857 | QWEST CORPORATION | 9636 | RIVERTON | WY | |
| 307-858 | UNION TELEPHONE COMPANY | 013B | RIVERTON | WY | |
| 307-859 | CENTURYTEL OF WYOMING, INC. DBA CENTURYLINK | 2299 | DANIEL | WY | |
| 307-864 | RT COMMUNICATIONS | 3410 | THERMOPOLS | WY | |
| 307-867 | TRI-COUNTY TEL. ASSN., INC. | 2296 | HAMITNDOME | WY | |
| 307-868 | TRI-COUNTY TEL. ASSN., INC. | 2296 | MEETEETSE | WY | |
| 307-870 | UNION TELEPHONE COMPANY | 013B | GREENRIVER | WY | |
| 307-871 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | GREENRIVER | WY | |
| 307-872 | QWEST CORPORATION | 9636 | GREENRIVER | WY | |
| 307-874 | UNION TEL. CO. | 2297 | MANILA | WY | |
| 307-875 | QWEST CORPORATION | 9636 | GREENRIVER | WY | |
| 307-876 | RT COMMUNICATIONS | 3410 | SHOSHONI | 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.