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 |
|---|---|---|---|---|---|---|---|
| 2010-01-26 | 661-268-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL AGDL | CA |
| 2010-01-26 | 661-268-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL AGDL | CA |
| 2010-01-26 | 661-380-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2010-01-26 | 661-468-3XXX | 3000–3999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL AGDL | CA |
| 2010-01-26 | 661-468-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL AGDL | CA |
| 2010-01-19 | 661-375-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | DELANO | CA |
| 2010-01-19 | 661-454-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | DELANO | CA |
| 2010-01-15 | 661-544-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL PLDL | CA |
| 2010-01-08 | 661-524-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LANCASTER | CA |
| 2010-01-07 | 661-376-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2010-01-07 | 661-379-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2010-01-07 | 661-557-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ARVIN | CA |
| 2009-12-30 | 661-247-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ARVIN | CA |
| 2009-12-30 | 661-380-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | BKFD MAIN | CA |
| 2009-12-29 | 661-379-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2009-12-29 | 661-379-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2009-12-29 | 661-379-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2009-12-29 | 661-574-5XXX | 5000–5999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL PLDL | CA |
| 2009-12-22 | 661-670-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | SNCA NHCS | CA |
| 2009-12-16 | 661-468-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL AGDL | CA |
| 2009-12-14 | 661-436-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ARVIN | CA |
| 2009-12-09 | 661-210-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | SNCA NHCS | CA |
| 2009-12-09 | 661-450-5XXX | 5000–5999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL AGDL | CA |
| 2009-12-02 | 661-709-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | DELANO | CA |
| 2009-11-24 | 661-382-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | PLDL PLDL | CA |
| 2009-11-24 | 661-382-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | PLDL PLDL | CA |
| 2009-11-24 | 661-575-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL PLDL | CA |
| 2009-11-20 | 661-341-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LANCASTER | CA |
| 2009-10-27 | 661-794-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL PLDL | CA |
| 2009-10-05 | 661-575-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLDL PLDL | CA |
| 2009-09-25 | 661-369-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2009-09-25 | 661-633-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2009-09-23 | 661-617-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD SOUTH | CA |
| 2009-09-21 | 661-240-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | WASCO | CA |
| 2009-09-18 | 661-229-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | DELANO | CA |
| 2009-09-04 | 661-229-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | DELANO | CA |
| 2009-09-03 | 661-200-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | SNCA NHCS | CA |
| 2009-09-03 | 661-505-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNCA NHCS | CA |
| 2009-09-03 | 661-644-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNCA NHCS | CA |
| 2009-08-10 | 661-382-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| 2009-08-10 | 661-480-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| 2009-08-10 | 661-675-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| 2009-07-31 | 661-617-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | BKFD SOUTH | CA |
| 2009-07-29 | 661-206-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LANCASTER | CA |
| 2009-07-29 | 661-903-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ARVIN | CA |
| 2009-07-01 | 661-846-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BKFD MAIN | CA |
| 2009-06-30 | 661-390-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | ARVIN | CA |
| 2009-06-11 | 661-617-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | BKFD SOUTH | CA |
| 2009-06-05 | 661-505-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNCA NHCS | CA |
| 2009-05-22 | 661-381-2XXX | 2000–2999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | 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.