NumberResearchRecent thousands-block assignments
21 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 |
|---|---|---|---|---|---|---|---|
| 2006-09-22 | 307-886-7XXX | 7000–7999 | Assigned | ONVOY, LLC - WY | 450F | AFTON | WY |
| 2006-09-20 | 307-333-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2006-09-20 | 307-514-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2006-09-12 | 307-922-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | ROCK SPG | WY |
| 2006-09-06 | 307-212-6XXX | 6000–6999 | Assigned | ONVOY, LLC - WY | 450F | ROCK SPG | WY |
| 2006-09-06 | 307-298-6XXX | 6000–6999 | Assigned | ONVOY, LLC - WY | 450F | DOUGLAS | WY |
| 2006-09-06 | 307-466-4XXX | 4000–4999 | Assigned | ONVOY, LLC - WY | 450F | GREENRIVER | WY |
| 2006-08-17 | 307-257-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GILLETTE | WY |
| 2006-08-09 | 307-433-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CHEYENNE | WY |
| 2006-07-28 | 307-629-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NEWCASTLE | WY |
| 2006-07-12 | 307-461-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SHERIDAN | WY |
| 2006-06-23 | 307-392-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | BORDER | WY |
| 2006-06-13 | 307-333-0XXX | 0000–0999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2006-06-09 | 307-200-0XXX | 0000–0999 | Assigned | ONVOY, LLC - WY | 450F | JACKSON | WY |
| 2006-06-09 | 307-335-4XXX | 4000–4999 | Assigned | ONVOY, LLC - WY | 450F | LANDER | WY |
| 2006-05-05 | 307-278-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BUFFALO | WY |
| 2006-03-24 | 307-316-0XXX | 0000–0999 | Assigned | ONVOY, LLC - WY | 450F | CHEYENNE | WY |
| 2006-02-10 | 307-462-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CASPER | WY |
| 2006-01-03 | 307-333-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2006-01-03 | 307-514-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2005-12-20 | 307-328-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | RAWLINS | WY |
| 2005-12-20 | 307-578-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CODY | WY |
| 2005-12-14 | 307-203-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JACKSON | WY |
| 2005-11-22 | 307-335-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LANDER | WY |
| 2005-11-22 | 307-463-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | RIVERTON | WY |
| 2005-10-04 | 307-514-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2005-10-03 | 307-461-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SHERIDAN | WY |
| 2005-08-10 | 307-212-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | ROCK SPG | WY |
| 2005-06-17 | 307-480-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | THERMOPOLS | WY |
| 2005-06-13 | 307-257-7XXX | 7000–7999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GILLETTE | WY |
| 2005-06-13 | 307-655-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SHERIDAN | WY |
| 2005-06-07 | 307-333-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2005-05-19 | 307-271-7XXX | 7000–7999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | POWELL | WY |
| 2005-03-21 | 307-391-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MOORCROFT | WY |
| 2005-03-04 | 307-460-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LARAMIE | WY |
| 2005-02-25 | 307-514-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2005-02-02 | 307-462-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | CASPER | WY |
| 2005-02-01 | 307-257-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | GILLETTE | WY |
| 2005-02-01 | 307-271-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | POWELL | WY |
| 2005-02-01 | 307-278-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | BUFFALO | WY |
| 2005-02-01 | 307-288-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | EVANSTON | WY |
| 2005-02-01 | 307-298-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | DOUGLAS | WY |
| 2005-02-01 | 307-335-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | LANDER | WY |
| 2005-02-01 | 307-877-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | KEMMERER | WY |
| 2005-01-14 | 307-459-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | CHEYENNE | WY |
| 2004-12-21 | 307-461-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SHERIDAN | WY |
| 2004-12-21 | 307-629-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NEWCASTLE | WY |
| 2004-12-15 | 307-459-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | CHEYENNE | WY |
| 2004-07-15 | 307-274-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHEYENNE | WY |
| 2004-06-04 | 307-256-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CHEYENNE | WY |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.