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 |
|---|---|---|---|---|---|---|---|
| 2005-07-05 | 661-460-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | WALKERBSIN | CA |
| 2005-07-05 | 661-528-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ROSAMOND | CA |
| 2005-07-05 | 661-577-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | TAFT | CA |
| 2005-07-05 | 661-584-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MOJAVE | CA |
| 2005-07-05 | 661-591-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | GLENNVILLE | CA |
| 2005-07-05 | 661-622-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | PLDL LNVY | CA |
| 2005-07-05 | 661-630-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SHAFTER | CA |
| 2005-07-05 | 661-641-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | EDWARDS | CA |
| 2005-07-05 | 661-667-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MCFARLAND | CA |
| 2005-07-05 | 661-704-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MCKITTRICK | CA |
| 2005-07-05 | 661-727-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HI VISTA | CA |
| 2005-07-05 | 661-750-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | TEHACHAPI | CA |
| 2005-07-05 | 661-766-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CUYAMA | CA |
| 2005-07-05 | 661-797-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LOST HILLS | CA |
| 2005-07-05 | 661-874-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LANCASTER | CA |
| 2005-07-05 | 661-877-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNCA NHCS | CA |
| 2005-06-29 | 661-219-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNCA NHCS | CA |
| 2005-06-29 | 661-361-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLDL PLDL | CA |
| 2005-06-29 | 661-361-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLDL PLDL | CA |
| 2005-06-27 | 661-206-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LANCASTER | CA |
| 2005-06-23 | 661-261-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BIG BUTTE | CA |
| 2005-06-23 | 661-465-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BERENDMESA | CA |
| 2005-06-23 | 661-469-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BUTTONWLLW | CA |
| 2005-06-23 | 661-689-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CLFRNHTSPG | CA |
| 2005-06-23 | 661-735-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BKFD SOUTH | CA |
| 2005-06-23 | 661-829-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BKFD NORTH | CA |
| 2005-06-23 | 661-855-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ARVIN | CA |
| 2005-06-19 | 661-802-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LANCASTER | CA |
| 2005-06-19 | 661-802-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LANCASTER | CA |
| 2005-06-10 | 661-361-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA |
| 2005-06-08 | 661-487-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2005-06-08 | 661-885-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | BKFD SOUTH | CA |
| 2005-06-06 | 661-337-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2005-06-06 | 661-337-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2005-06-06 | 661-444-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2005-06-06 | 661-632-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BKFD MAIN | CA |
| 2005-06-03 | 661-302-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BKFD MAIN | CA |
| 2005-05-27 | 661-449-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| 2005-05-26 | 661-932-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | BKFD MAIN | CA |
| 2005-05-23 | 661-241-5XXX | 5000–5999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | BKFD SOUTH | CA |
| 2005-05-23 | 661-679-1XXX | 1000–1999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | BKFD NORTH | CA |
| 2005-05-20 | 661-424-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNCA SGCC | CA |
| 2005-05-20 | 661-424-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNCA SGCC | CA |
| 2005-05-20 | 661-449-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLDL PLDL | CA |
| 2005-05-20 | 661-449-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLDL PLDL | CA |
| 2005-05-20 | 661-449-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLDL PLDL | CA |
| 2005-05-20 | 661-678-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | SNCA NHCS | CA |
| 2005-05-20 | 661-678-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | SNCA NHCS | CA |
| 2005-05-20 | 661-678-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | SNCA NHCS | CA |
| 2005-05-17 | 661-431-1XXX | 1000–1999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | 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.