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 |
|---|---|---|---|---|---|---|---|
| 2015-01-30 | 661-525-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD NORTH | CA |
| 2015-01-30 | 661-525-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD NORTH | CA |
| 2015-01-29 | 661-436-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ARVIN | CA |
| 2015-01-29 | 661-776-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | SHAFTER | CA |
| 2015-01-23 | 661-214-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LOST HILLS | CA |
| 2015-01-23 | 661-230-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | EDWARDS | CA |
| 2015-01-23 | 661-231-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LEBEC | CA |
| 2015-01-23 | 661-235-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ROSAMOND | CA |
| 2015-01-23 | 661-237-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SHAFTER | CA |
| 2015-01-23 | 661-239-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WALKERBSIN | CA |
| 2015-01-23 | 661-271-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MOJAVE | CA |
| 2015-01-23 | 661-523-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNCA SGCC | CA |
| 2015-01-23 | 661-523-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNCA SGCC | CA |
| 2015-01-23 | 661-745-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | TAFT | CA |
| 2015-01-21 | 661-552-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | EARLIMART | CA |
| 2015-01-15 | 661-754-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MOJAVE | CA |
| 2015-01-14 | 661-372-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | DELANO | CA |
| 2015-01-09 | 661-497-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BKFD MAIN | CA |
| 2015-01-08 | 661-451-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ARVIN | CA |
| 2015-01-06 | 661-486-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL AGDL | CA |
| 2014-12-26 | 661-497-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2014-12-26 | 661-497-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2014-12-23 | 661-384-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2014-12-23 | 661-384-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2014-12-22 | 661-488-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
| 2014-12-22 | 661-488-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
| 2014-12-22 | 661-488-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
| 2014-12-22 | 661-488-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
| 2014-12-22 | 661-488-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
| 2014-12-22 | 661-488-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
| 2014-12-15 | 661-384-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2014-12-15 | 661-447-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2014-12-15 | 661-489-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2014-12-15 | 661-634-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2014-12-11 | 661-495-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SNCA NHCS | CA |
| 2014-12-09 | 661-667-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | MCFARLAND | CA |
| 2014-12-03 | 661-485-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| 2014-12-03 | 661-485-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| 2014-12-03 | 661-494-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | LANCASTER | CA |
| 2014-12-02 | 661-495-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | SNCA NHCS | CA |
| 2014-12-02 | 661-495-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | SNCA NHCS | CA |
| 2014-11-26 | 661-548-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CLFRNHTSPG | CA |
| 2014-11-25 | 661-491-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | BKFD SOUTH | CA |
| 2014-11-25 | 661-491-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | BKFD SOUTH | CA |
| 2014-11-25 | 661-525-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BKFD NORTH | CA |
| 2014-11-18 | 661-384-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | BKFD MAIN | CA |
| 2014-11-18 | 661-384-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | BKFD MAIN | CA |
| 2014-11-18 | 661-384-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | BKFD MAIN | CA |
| 2014-11-13 | 661-446-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | DELANO | CA |
| 2014-11-11 | 661-495-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNCA NHCS | 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.