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 |
|---|---|---|---|---|---|---|---|
| 2017-11-29 | 661-356-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MOJAVE | CA |
| 2017-11-29 | 661-356-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MOJAVE | CA |
| 2017-11-29 | 661-356-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MOJAVE | CA |
| 2017-11-29 | 661-358-0XXX | 0000–0999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TAFT | CA |
| 2017-11-29 | 661-358-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TAFT | CA |
| 2017-11-29 | 661-358-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TAFT | CA |
| 2017-11-29 | 661-358-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TAFT | CA |
| 2017-11-29 | 661-358-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TAFT | CA |
| 2017-11-29 | 661-358-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TAFT | CA |
| 2017-11-29 | 661-358-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TAFT | CA |
| 2017-11-29 | 661-359-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | DELANO | CA |
| 2017-11-29 | 661-359-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | DELANO | CA |
| 2017-11-29 | 661-359-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | DELANO | CA |
| 2017-11-29 | 661-359-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | DELANO | CA |
| 2017-11-29 | 661-359-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | DELANO | CA |
| 2017-11-29 | 661-359-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | DELANO | CA |
| 2017-11-28 | 661-352-0XXX | 0000–0999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | EDWARDS | CA |
| 2017-11-28 | 661-352-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | EDWARDS | CA |
| 2017-11-28 | 661-352-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | EDWARDS | CA |
| 2017-11-28 | 661-352-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | EDWARDS | CA |
| 2017-11-28 | 661-352-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | EDWARDS | CA |
| 2017-11-28 | 661-352-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | EDWARDS | CA |
| 2017-11-28 | 661-352-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | EDWARDS | CA |
| 2017-11-21 | 661-403-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| 2017-11-21 | 661-403-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| 2017-11-03 | 661-218-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD NORTH | CA |
| 2017-10-24 | 661-207-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNCA NHCS | CA |
| 2017-10-24 | 661-218-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD NORTH | CA |
| 2017-10-24 | 661-592-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNCA SGCC | CA |
| 2017-10-17 | 661-486-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL AGDL | CA |
| 2017-10-04 | 661-218-8XXX | 8000–8999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | BKFD NORTH | CA |
| 2017-09-25 | 661-479-7XXX | 7000–7999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | BKFD MAIN | CA |
| 2017-09-25 | 661-885-7XXX | 7000–7999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | BKFD SOUTH | CA |
| 2017-09-20 | 661-370-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | DELANO | CA |
| 2017-09-18 | 661-407-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2017-09-15 | 661-314-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2017-09-12 | 661-543-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MCFARLAND | CA |
| 2017-09-11 | 661-405-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LANCASTER | CA |
| 2017-09-11 | 661-885-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD SOUTH | CA |
| 2017-08-29 | 661-630-2XXX | 2000–2999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | SHAFTER | CA |
| 2017-08-14 | 661-404-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2017-08-14 | 661-479-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2017-08-14 | 661-662-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BKFD MAIN | CA |
| 2017-08-11 | 661-417-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNCA NHCS | CA |
| 2017-08-07 | 661-409-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL PLDL | CA |
| 2017-08-02 | 661-338-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | LAKEHUGHES | CA |
| 2017-08-02 | 661-450-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | PLDL AGDL | CA |
| 2017-08-02 | 661-727-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | HI VISTA | CA |
| 2017-08-01 | 661-405-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LANCASTER | CA |
| 2017-08-01 | 661-405-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LANCASTER | 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.