NumberResearchRecent thousands-block assignments
18 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 |
|---|---|---|---|---|---|---|---|
| 2004-02-20 | 661-607-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | SNCA NHCS | CA |
| 2004-02-16 | 661-607-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNCA NHCS | CA |
| 2004-02-16 | 661-607-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNCA NHCS | CA |
| 2004-02-16 | 661-607-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNCA NHCS | CA |
| 2004-02-16 | 661-717-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2004-02-16 | 661-717-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2004-02-10 | 661-829-2XXX | 2000–2999 | Assigned | PACIFIC BELL | 9740 | BKFD NORTH | CA |
| 2004-02-04 | 661-829-1XXX | 1000–1999 | Assigned | PACIFIC BELL | 9740 | BKFD NORTH | CA |
| 2004-02-02 | 661-477-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2004-02-02 | 661-477-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2004-01-15 | 661-309-7XXX | 7000–7999 | Assigned | METROPCS NETWORKS, LLC | 899D | SNCA SGCC | CA |
| 2004-01-15 | 661-575-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLDL PLDL | CA |
| 2004-01-09 | 661-717-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2004-01-08 | 661-309-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | SNCA SGCC | CA |
| 2004-01-05 | 661-600-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | SNCA NHCS | CA |
| 2003-12-16 | 661-717-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2003-12-10 | 661-860-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2003-12-10 | 661-860-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2003-11-21 | 661-444-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | BKFD MAIN | CA |
| 2003-11-21 | 661-444-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BKFD MAIN | CA |
| 2003-11-20 | 661-674-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
| 2003-11-14 | 661-456-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLDL PLDL | CA |
| 2003-11-14 | 661-456-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLDL PLDL | CA |
| 2003-10-22 | 661-607-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNCA NHCS | CA |
| 2003-10-22 | 661-607-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNCA NHCS | CA |
| 2003-09-25 | 661-321-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2003-09-25 | 661-363-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2003-09-25 | 661-364-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2003-09-25 | 661-364-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2003-09-25 | 661-378-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2003-09-25 | 661-378-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2003-09-25 | 661-378-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2003-09-25 | 661-378-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2003-09-25 | 661-444-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2003-09-25 | 661-444-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2003-09-25 | 661-444-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2003-09-25 | 661-444-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2003-09-17 | 661-600-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | SNCA NHCS | CA |
| 2003-09-12 | 661-477-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2003-09-12 | 661-477-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2003-09-11 | 661-236-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2003-09-11 | 661-236-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2003-09-11 | 661-236-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2003-08-06 | 661-860-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLDL PLDL | CA |
| 2003-08-06 | 661-860-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLDL PLDL | CA |
| 2003-08-06 | 661-877-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | SNCA NHCS | CA |
| 2003-08-06 | 661-877-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | SNCA NHCS | CA |
| 2003-08-04 | 661-233-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLDL PLDL | CA |
| 2003-08-04 | 661-233-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLDL PLDL | CA |
| 2003-08-04 | 661-233-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLDL PLDL | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.