NumberResearchRecent thousands-block assignments
21 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, last 30 days — NPA 307
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 | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2023-09-29 | 307-410-1XXX | 1000–1999 | Assigned | ONVOY, LLC - WY | 450F | POWELL | WY |
| 2023-09-29 | 307-410-2XXX | 2000–2999 | Assigned | ONVOY, LLC - WY | 450F | POWELL | WY |
| 2023-09-29 | 307-624-5XXX | 5000–5999 | Assigned | ONVOY, LLC - WY | 450F | DOUGLAS | WY |
| 2023-09-29 | 307-666-0XXX | 0000–0999 | Assigned | ONVOY, LLC - WY | 450F | CHEYENNE | WY |
| 2023-09-29 | 307-990-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | LANDER | WY |
| 2023-09-29 | 307-990-9XXX | 9000–9999 | Assigned | ONVOY, LLC - WY | 450F | LANDER | WY |
| 2023-09-13 | 307-295-2XXX | 2000–2999 | Assigned | ONVOY, LLC - WY | 450F | TORRINGTON | WY |
| 2023-09-12 | 307-293-9XXX | 9000–9999 | Assigned | ONVOY, LLC - WY | 450F | GUERNSEY | WY |
| 2023-09-12 | 307-294-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | BIG PINEY | WY |
| 2023-09-12 | 307-333-9XXX | 9000–9999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2023-09-12 | 307-336-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | DANIEL | WY |
| 2023-09-12 | 307-355-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | LA GRANGE | WY |
| 2023-09-12 | 307-374-9XXX | 9000–9999 | Assigned | ONVOY, LLC - WY | 450F | ROCK SPG | WY |
| 2023-09-12 | 307-387-6XXX | 6000–6999 | Assigned | ONVOY, LLC - WY | 450F | GILLETTE | WY |
| 2023-09-12 | 307-416-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | PINEDALE | WY |
| 2023-09-12 | 307-481-5XXX | 5000–5999 | Assigned | ONVOY, LLC - WY | 450F | LUSK | WY |
| 2023-09-01 | 307-533-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | SHERIDAN | WY |
| 2023-08-25 | 307-408-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | LYMAN | WY |
| 2023-08-24 | 307-394-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CASPER | WY |
| 2023-08-17 | 307-396-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | GREENRIVER | WY |
| 2023-08-17 | 307-419-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | CODY | WY |
| 2023-08-15 | 307-243-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CASPER | WY |
| 2023-08-11 | 307-410-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | POWELL | WY |
| 2023-08-10 | 307-423-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | BUFFALO | WY |
| 2023-08-01 | 307-294-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA WY-LLC | 879G | BIG PINEY | WY |
| 2023-07-28 | 307-203-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | JACKSON | WY |
| 2023-07-19 | 307-463-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | RIVERTON | WY |
| 2023-07-13 | 307-289-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA WY-LLC | 879G | CHEYENNE | WY |
| 2023-07-13 | 307-441-3XXX | 3000–3999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2023-07-13 | 307-441-5XXX | 5000–5999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2023-07-13 | 307-441-9XXX | 9000–9999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2023-07-13 | 307-458-1XXX | 1000–1999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2023-07-13 | 307-458-2XXX | 2000–2999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2023-07-13 | 307-458-3XXX | 3000–3999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2023-07-13 | 307-458-4XXX | 4000–4999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2023-07-13 | 307-458-5XXX | 5000–5999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2023-07-13 | 307-458-7XXX | 7000–7999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2023-07-13 | 307-458-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2023-07-13 | 307-556-1XXX | 1000–1999 | Assigned | ONVOY, LLC - WY | 450F | RIVERTON | WY |
| 2023-07-13 | 307-556-4XXX | 4000–4999 | Assigned | ONVOY, LLC - WY | 450F | RIVERTON | WY |
| 2023-07-13 | 307-556-7XXX | 7000–7999 | Assigned | ONVOY, LLC - WY | 450F | RIVERTON | WY |
| 2023-07-13 | 307-556-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | RIVERTON | WY |
| 2023-07-12 | 307-227-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MAMMOTH | WY |
| 2023-06-26 | 307-289-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CHEYENNE | WY |
| 2023-06-23 | 307-289-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | CHEYENNE | WY |
| 2023-06-23 | 307-306-6XXX | 6000–6999 | Assigned | ONVOY, LLC - WY | 450F | DOUGLAS | WY |
| 2023-06-23 | 307-374-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | ROCK SPG | WY |
| 2023-06-23 | 307-393-7XXX | 7000–7999 | Assigned | ONVOY, LLC - WY | 450F | EVANSTON | WY |
| 2023-06-23 | 307-395-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | LARAMIE | WY |
| 2023-06-23 | 307-410-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | POWELL | WY |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.