NumberResearchRecent thousands-block assignments
18 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 |
|---|---|---|---|---|---|---|---|
| 2010-09-15 | 661-544-7XXX | 7000–7999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL PLDL | CA |
| 2010-09-08 | 661-777-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | LEBEC | CA |
| 2010-09-03 | 661-220-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ARVIN | CA |
| 2010-09-03 | 661-238-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | TEHACHAPI | CA |
| 2010-09-03 | 661-382-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PLDL PLDL | CA |
| 2010-09-01 | 661-544-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL PLDL | CA |
| 2010-08-27 | 661-368-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BKFD NORTH | CA |
| 2010-08-25 | 661-235-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ROSAMOND | CA |
| 2010-08-25 | 661-237-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SHAFTER | CA |
| 2010-08-25 | 661-458-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MCFARLAND | CA |
| 2010-08-23 | 661-888-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNCA NHCS | CA |
| 2010-08-18 | 661-579-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | LANCASTER | CA |
| 2010-08-17 | 661-388-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNCA NHCS | CA |
| 2010-08-11 | 661-380-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BKFD MAIN | CA |
| 2010-08-06 | 661-347-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNCA SGCC | CA |
| 2010-08-06 | 661-379-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BKFD MAIN | CA |
| 2010-08-06 | 661-674-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | LANCASTER | CA |
| 2010-08-05 | 661-381-7XXX | 7000–7999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | BKFD SOUTH | CA |
| 2010-08-04 | 661-390-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ARVIN | CA |
| 2010-08-04 | 661-557-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ARVIN | CA |
| 2010-08-03 | 661-221-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MOJAVE | CA |
| 2010-08-03 | 661-239-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WALKERBSIN | CA |
| 2010-08-02 | 661-214-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LOST HILLS | CA |
| 2010-08-02 | 661-230-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | EDWARDS | CA |
| 2010-08-02 | 661-231-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LEBEC | CA |
| 2010-08-02 | 661-455-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | GLENNVILLE | CA |
| 2010-08-02 | 661-704-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MCKITTRICK | CA |
| 2010-07-30 | 661-413-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CUYAMA | CA |
| 2010-07-30 | 661-452-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BERENDMESA | CA |
| 2010-07-30 | 661-469-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BUTTONWLLW | CA |
| 2010-07-30 | 661-548-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CLFRNHTSPG | CA |
| 2010-07-22 | 661-243-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BKFD NORTH | CA |
| 2010-07-09 | 661-379-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BKFD MAIN | CA |
| 2010-07-08 | 661-670-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SNCA NHCS | CA |
| 2010-06-17 | 661-505-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNCA NHCS | CA |
| 2010-06-03 | 661-200-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNCA NHCS | CA |
| 2010-06-03 | 661-243-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BKFD NORTH | CA |
| 2010-06-03 | 661-293-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | TAFT | CA |
| 2010-06-03 | 661-381-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BKFD SOUTH | CA |
| 2010-06-03 | 661-381-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BKFD SOUTH | CA |
| 2010-06-03 | 661-381-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BKFD SOUTH | CA |
| 2010-06-03 | 661-390-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ARVIN | CA |
| 2010-06-03 | 661-474-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DELANO | CA |
| 2010-06-03 | 661-505-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNCA NHCS | CA |
| 2010-06-03 | 661-544-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PLDL PLDL | CA |
| 2010-06-03 | 661-544-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PLDL PLDL | CA |
| 2010-06-03 | 661-579-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LANCASTER | CA |
| 2010-06-03 | 661-579-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LANCASTER | CA |
| 2010-06-03 | 661-621-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNCA SGCC | CA |
| 2010-06-03 | 661-621-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNCA SGCC | 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.