NumberResearchRecent thousands-block assignments
16 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 661
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 |
|---|---|---|---|---|---|---|---|
| 2018-03-26 | 661-479-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2018-03-26 | 661-479-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2018-03-14 | 661-741-0XXX | 0000–0999 | Assigned | VONAGE AMERICA LLC | 197D | BKFD MAIN | CA |
| 2018-03-07 | 661-885-6XXX | 6000–6999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | BKFD SOUTH | CA |
| 2018-02-12 | 661-534-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | DELANO | CA |
| 2018-02-12 | 661-749-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | MOJAVE | CA |
| 2018-02-09 | 661-289-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LEBEC | CA |
| 2018-02-06 | 661-479-5XXX | 5000–5999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | BKFD MAIN | CA |
| 2018-01-02 | 661-759-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WASCO | CA |
| 2017-12-28 | 661-528-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | ROSAMOND | CA |
| 2017-12-22 | 661-417-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | SNCA NHCS | CA |
| 2017-12-19 | 661-218-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | BKFD NORTH | CA |
| 2017-12-19 | 661-218-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | BKFD NORTH | CA |
| 2017-12-08 | 661-357-0XXX | 0000–0999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TEHACHAPI | CA |
| 2017-12-08 | 661-357-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TEHACHAPI | CA |
| 2017-12-08 | 661-357-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TEHACHAPI | CA |
| 2017-12-08 | 661-357-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TEHACHAPI | CA |
| 2017-12-08 | 661-357-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TEHACHAPI | CA |
| 2017-12-08 | 661-357-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TEHACHAPI | CA |
| 2017-12-08 | 661-357-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TEHACHAPI | CA |
| 2017-12-08 | 661-359-0XXX | 0000–0999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | DELANO | CA |
| 2017-12-08 | 661-405-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LANCASTER | CA |
| 2017-12-08 | 661-454-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | DELANO | CA |
| 2017-12-08 | 661-759-5XXX | 5000–5999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | WASCO | CA |
| 2017-12-06 | 661-353-0XXX | 0000–0999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LANCASTER | CA |
| 2017-12-06 | 661-353-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LANCASTER | CA |
| 2017-12-04 | 661-355-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | ROSAMOND | CA |
| 2017-12-04 | 661-355-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | ROSAMOND | CA |
| 2017-12-04 | 661-355-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | ROSAMOND | CA |
| 2017-12-04 | 661-355-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | ROSAMOND | CA |
| 2017-12-04 | 661-355-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | ROSAMOND | CA |
| 2017-12-04 | 661-355-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | ROSAMOND | CA |
| 2017-12-01 | 661-207-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SNCA NHCS | CA |
| 2017-12-01 | 661-207-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SNCA NHCS | CA |
| 2017-12-01 | 661-207-8XXX | 8000–8999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SNCA NHCS | CA |
| 2017-12-01 | 661-417-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SNCA NHCS | CA |
| 2017-12-01 | 661-771-0XXX | 0000–0999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TEHACHAPI | CA |
| 2017-11-30 | 661-351-0XXX | 0000–0999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LAKEHUGHES | CA |
| 2017-11-30 | 661-351-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LAKEHUGHES | CA |
| 2017-11-29 | 661-354-0XXX | 0000–0999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | BKFD MAIN | CA |
| 2017-11-29 | 661-354-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | BKFD MAIN | CA |
| 2017-11-29 | 661-354-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | BKFD MAIN | CA |
| 2017-11-29 | 661-354-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | BKFD MAIN | CA |
| 2017-11-29 | 661-354-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | BKFD MAIN | CA |
| 2017-11-29 | 661-354-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | BKFD MAIN | CA |
| 2017-11-29 | 661-354-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | BKFD MAIN | CA |
| 2017-11-29 | 661-356-0XXX | 0000–0999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MOJAVE | CA |
| 2017-11-29 | 661-356-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MOJAVE | CA |
| 2017-11-29 | 661-356-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MOJAVE | CA |
| 2017-11-29 | 661-356-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MOJAVE | CA |
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.