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 |
|---|---|---|---|---|---|---|---|
| 2006-08-09 | 661-367-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNCA SGCC | CA |
| 2006-08-09 | 661-839-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLDL PLDL | CA |
| 2006-08-09 | 661-858-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD SOUTH | CA |
| 2006-08-09 | 661-858-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD SOUTH | CA |
| 2006-08-09 | 661-858-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD SOUTH | CA |
| 2006-08-09 | 661-858-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD SOUTH | CA |
| 2006-08-09 | 661-858-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD SOUTH | CA |
| 2006-08-04 | 661-857-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNCA NHCS | CA |
| 2006-07-24 | 661-857-5XXX | 5000–5999 | Assigned | METROPCS NETWORKS, LLC | 899D | SNCA NHCS | CA |
| 2006-07-17 | 661-910-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SHAFTER | CA |
| 2006-07-14 | 661-778-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | DELANO | CA |
| 2006-07-14 | 661-877-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | SNCA NHCS | CA |
| 2006-07-13 | 661-337-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2006-07-13 | 661-912-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2006-07-13 | 661-912-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2006-07-13 | 661-912-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2006-07-12 | 661-264-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2006-06-19 | 661-229-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | DELANO | CA |
| 2006-06-16 | 661-476-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNCA NHCS | CA |
| 2006-06-16 | 661-476-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNCA NHCS | CA |
| 2006-06-13 | 661-794-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PLDL PLDL | CA |
| 2006-06-13 | 661-857-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNCA NHCS | CA |
| 2006-06-09 | 661-219-8XXX | 8000–8999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SNCA NHCS | CA |
| 2006-06-09 | 661-268-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PLDL AGDL | CA |
| 2006-06-09 | 661-270-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PLDL LNVY | CA |
| 2006-06-09 | 661-424-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SNCA SGCC | CA |
| 2006-06-09 | 661-724-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LAKEHUGHES | CA |
| 2006-06-09 | 661-727-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | HI VISTA | CA |
| 2006-06-09 | 661-728-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LANCASTER | CA |
| 2006-06-09 | 661-753-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNCA NHCS | CA |
| 2006-06-09 | 661-794-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | PLDL PLDL | CA |
| 2006-06-08 | 661-794-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | PLDL PLDL | CA |
| 2006-05-31 | 661-309-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | SNCA SGCC | CA |
| 2006-05-31 | 661-817-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2006-05-24 | 661-794-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2006-05-22 | 661-865-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | BKFD MAIN | CA |
| 2006-05-09 | 661-219-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | SNCA NHCS | CA |
| 2006-05-09 | 661-829-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | BKFD NORTH | CA |
| 2006-05-04 | 661-678-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | SNCA NHCS | CA |
| 2006-05-03 | 661-244-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SNCA NHCS | CA |
| 2006-04-19 | 661-874-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
| 2006-04-18 | 661-886-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LANCASTER | CA |
| 2006-04-18 | 661-886-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LANCASTER | CA |
| 2006-04-17 | 661-229-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DELANO | CA |
| 2006-04-17 | 661-944-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2006-04-07 | 661-316-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BKFD MAIN | CA |
| 2006-03-23 | 661-794-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2006-03-13 | 661-431-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BKFD MAIN | CA |
| 2006-03-09 | 661-387-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | BKFD NORTH | CA |
| 2006-03-06 | 661-852-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | 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.