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 |
|---|---|---|---|---|---|---|---|
| 2007-07-12 | 661-974-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
| 2007-07-12 | 661-974-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
| 2007-07-12 | 661-974-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
| 2007-07-11 | 661-877-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNCA NHCS | CA |
| 2007-07-02 | 661-390-4XXX | 4000–4999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | ARVIN | CA |
| 2007-06-29 | 661-238-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEHACHAPI | CA |
| 2007-06-29 | 661-998-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| 2007-06-27 | 661-240-5XXX | 5000–5999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | WASCO | CA |
| 2007-06-27 | 661-469-5XXX | 5000–5999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | BUTTONWLLW | CA |
| 2007-06-27 | 661-630-5XXX | 5000–5999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | SHAFTER | CA |
| 2007-06-27 | 661-679-4XXX | 4000–4999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | BKFD NORTH | CA |
| 2007-06-27 | 661-735-5XXX | 5000–5999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | BKFD SOUTH | CA |
| 2007-06-27 | 661-735-7XXX | 7000–7999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | BKFD SOUTH | CA |
| 2007-06-27 | 661-745-4XXX | 4000–4999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | TAFT | CA |
| 2007-06-27 | 661-778-0XXX | 0000–0999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | DELANO | CA |
| 2007-06-27 | 661-792-4XXX | 4000–4999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | MCFARLAND | CA |
| 2007-06-27 | 661-823-4XXX | 4000–4999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | TEHACHAPI | CA |
| 2007-06-21 | 661-902-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LANCASTER | CA |
| 2007-06-11 | 661-368-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | BKFD NORTH | CA |
| 2007-06-08 | 661-699-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD SOUTH | CA |
| 2007-06-08 | 661-858-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD SOUTH | CA |
| 2007-05-29 | 661-476-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | SNCA NHCS | CA |
| 2007-05-15 | 661-974-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
| 2007-05-15 | 661-974-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
| 2007-05-15 | 661-974-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
| 2007-05-08 | 661-770-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | TAFT | CA |
| 2007-05-08 | 661-910-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SHAFTER | CA |
| 2007-05-07 | 661-348-4XXX | 4000–4999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | BKFD MAIN | CA |
| 2007-05-02 | 661-670-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | SNCA NHCS | CA |
| 2007-04-13 | 661-346-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2007-04-13 | 661-346-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2007-04-06 | 661-754-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MOJAVE | CA |
| 2007-04-04 | 661-208-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| 2007-04-04 | 661-241-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | BKFD SOUTH | CA |
| 2007-03-29 | 661-476-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | SNCA NHCS | CA |
| 2007-03-27 | 661-364-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2007-03-27 | 661-364-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2007-03-27 | 661-578-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2007-03-27 | 661-578-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2007-03-27 | 661-578-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2007-03-27 | 661-578-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2007-03-27 | 661-578-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2007-03-27 | 661-578-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2007-03-27 | 661-864-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2007-03-27 | 661-864-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2007-03-27 | 661-873-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2007-03-20 | 661-370-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DELANO | CA |
| 2007-03-20 | 661-370-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DELANO | CA |
| 2007-03-12 | 661-282-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | BKFD SOUTH | CA |
| 2007-03-12 | 661-282-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | BKFD SOUTH | 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.