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 |
|---|---|---|---|---|---|---|---|
| 2008-11-13 | 661-375-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DELANO | CA |
| 2008-11-12 | 661-505-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNCA NHCS | CA |
| 2008-11-06 | 661-240-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WASCO | CA |
| 2008-10-29 | 661-412-5XXX | 5000–5999 | Assigned | PACIFIC BELL | 9740 | BKFD SOUTH | CA |
| 2008-10-24 | 661-932-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BKFD MAIN | CA |
| 2008-10-20 | 661-347-7XXX | 7000–7999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SNCA SGCC | CA |
| 2008-10-20 | 661-427-4XXX | 4000–4999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | BKFD MAIN | CA |
| 2008-10-20 | 661-505-4XXX | 4000–4999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SNCA NHCS | CA |
| 2008-10-16 | 661-376-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-10-16 | 661-376-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-10-16 | 661-376-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-10-16 | 661-376-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-10-16 | 661-376-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-10-16 | 661-376-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-10-16 | 661-376-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-10-16 | 661-376-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-10-13 | 661-450-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | PLDL AGDL | CA |
| 2008-10-13 | 661-873-4XXX | 4000–4999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | BKFD MAIN | CA |
| 2008-10-01 | 661-557-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ARVIN | CA |
| 2008-09-29 | 661-505-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNCA NHCS | CA |
| 2008-09-23 | 661-208-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| 2008-09-23 | 661-709-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DELANO | CA |
| 2008-09-23 | 661-998-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| 2008-09-23 | 661-998-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2008-09-23 | 661-998-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2008-09-17 | 661-579-2XXX | 2000–2999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LANCASTER | CA |
| 2008-09-08 | 661-412-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BKFD SOUTH | CA |
| 2008-09-08 | 661-709-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | DELANO | CA |
| 2008-08-22 | 661-270-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | PLDL LNVY | CA |
| 2008-08-22 | 661-338-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | LAKEHUGHES | CA |
| 2008-08-22 | 661-339-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | HI VISTA | CA |
| 2008-08-22 | 661-462-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | BIG BUTTE | CA |
| 2008-08-22 | 661-468-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | PLDL AGDL | CA |
| 2008-08-19 | 661-387-8XXX | 8000–8999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | BKFD NORTH | CA |
| 2008-08-19 | 661-396-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | BKFD SOUTH | CA |
| 2008-08-07 | 661-412-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD SOUTH | CA |
| 2008-08-07 | 661-505-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNCA NHCS | CA |
| 2008-08-07 | 661-859-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2008-08-05 | 661-348-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-08-05 | 661-369-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-08-05 | 661-371-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-08-05 | 661-371-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-08-05 | 661-374-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-08-05 | 661-578-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-08-05 | 661-578-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2008-08-05 | 661-579-8XXX | 8000–8999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LANCASTER | CA |
| 2008-07-24 | 661-480-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | PLDL PLDL | CA |
| 2008-07-24 | 661-794-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | PLDL PLDL | CA |
| 2008-07-23 | 661-524-2XXX | 2000–2999 | Assigned | PACIFIC BELL (COMPETITIVE) | 7480 | LANCASTER | CA |
| 2008-07-22 | 661-829-5XXX | 5000–5999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | BKFD NORTH | 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.