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 |
|---|---|---|---|---|---|---|---|
| 2015-11-24 | 661-546-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2015-11-20 | 661-583-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2015-11-20 | 661-583-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2015-11-20 | 661-583-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2015-11-20 | 661-583-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2015-11-20 | 661-583-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2015-11-20 | 661-855-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ARVIN | CA |
| 2015-11-19 | 661-535-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | BKFD NORTH | CA |
| 2015-11-13 | 661-528-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ROSAMOND | CA |
| 2015-11-13 | 661-528-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ROSAMOND | CA |
| 2015-11-13 | 661-583-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLDL PLDL | CA |
| 2015-11-13 | 661-583-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLDL PLDL | CA |
| 2015-11-09 | 661-527-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD SOUTH | CA |
| 2015-11-09 | 661-576-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLDL PLDL | CA |
| 2015-10-29 | 661-543-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MCFARLAND | CA |
| 2015-10-29 | 661-568-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | SNCA NHCS | CA |
| 2015-10-21 | 661-582-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LANCASTER | CA |
| 2015-10-20 | 661-779-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ARVIN | CA |
| 2015-10-19 | 661-488-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LANCASTER | CA |
| 2015-10-19 | 661-494-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LANCASTER | CA |
| 2015-10-09 | 661-522-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | LANCASTER | CA |
| 2015-10-07 | 661-270-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | PLDL LNVY | CA |
| 2015-10-01 | 661-238-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEHACHAPI | CA |
| 2015-10-01 | 661-668-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | EARLIMART | CA |
| 2015-10-01 | 661-668-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | EARLIMART | CA |
| 2015-09-29 | 661-568-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNCA NHCS | CA |
| 2015-09-29 | 661-772-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WASCO | CA |
| 2015-09-16 | 661-522-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | LANCASTER | CA |
| 2015-09-16 | 661-522-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | LANCASTER | CA |
| 2015-09-10 | 661-568-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNCA NHCS | CA |
| 2015-09-03 | 661-542-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNCA SGCC | CA |
| 2015-09-03 | 661-576-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLDL PLDL | CA |
| 2015-09-03 | 661-576-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLDL PLDL | CA |
| 2015-09-03 | 661-576-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLDL PLDL | CA |
| 2015-09-02 | 661-563-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2015-09-02 | 661-563-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2015-09-02 | 661-563-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2015-09-02 | 661-573-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2015-09-02 | 661-573-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2015-09-02 | 661-573-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2015-09-01 | 661-235-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ROSAMOND | CA |
| 2015-09-01 | 661-239-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WALKERBSIN | CA |
| 2015-09-01 | 661-459-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SHAFTER | CA |
| 2015-08-25 | 661-230-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | EDWARDS | CA |
| 2015-08-25 | 661-231-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LEBEC | CA |
| 2015-08-25 | 661-232-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MOJAVE | CA |
| 2015-08-25 | 661-413-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CUYAMA | CA |
| 2015-08-25 | 661-457-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LOST HILLS | CA |
| 2015-08-25 | 661-543-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MCFARLAND | CA |
| 2015-08-25 | 661-576-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLDL PLDL | 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.