NumberResearchRecent thousands-block assignments
25 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 858
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 |
|---|---|---|---|---|---|---|---|
| 2016-01-25 | 858-951-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | RNCHOSANFE | CA |
| 2016-01-25 | 858-951-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | RNCHOSANFE | CA |
| 2016-01-22 | 858-682-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | POWAY | CA |
| 2016-01-22 | 858-726-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | POWAY | CA |
| 2016-01-19 | 858-267-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNDG MRMS | CA |
| 2016-01-14 | 858-262-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | SNDG LVTA | CA |
| 2016-01-14 | 858-262-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | SNDG LVTA | CA |
| 2016-01-14 | 858-262-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | SNDG LVTA | CA |
| 2016-01-14 | 858-262-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | SNDG LVTA | CA |
| 2015-12-31 | 858-391-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | POWAY | CA |
| 2015-12-31 | 858-602-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | POWAY | CA |
| 2015-12-31 | 858-732-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2015-12-31 | 858-732-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2015-12-28 | 858-324-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOPNQTS | CA |
| 2015-12-21 | 858-267-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2015-12-21 | 858-267-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2015-12-10 | 858-732-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2015-12-10 | 858-732-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2015-12-08 | 858-261-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DEL MAR | CA |
| 2015-11-16 | 858-732-9XXX | 9000–9999 | Assigned | PAETEC ITEL, LLC | 829J | LA JOLLA | CA |
| 2015-11-13 | 858-322-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-11-11 | 858-261-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DEL MAR | CA |
| 2015-11-09 | 858-879-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RNCHOBRNDO | CA |
| 2015-10-27 | 858-987-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SNDG LVTA | CA |
| 2015-10-22 | 858-261-2XXX | 2000–2999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | DEL MAR | CA |
| 2015-10-22 | 858-883-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | POWAY | CA |
| 2015-10-22 | 858-883-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | POWAY | CA |
| 2015-10-20 | 858-267-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-10-20 | 858-267-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-10-20 | 858-267-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-10-20 | 858-267-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-10-19 | 858-732-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2015-10-19 | 858-732-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2015-09-30 | 858-376-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | RNCHOBRNDO | CA |
| 2015-09-30 | 858-732-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LA JOLLA | CA |
| 2015-09-29 | 858-798-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RNCHOBRNDO | CA |
| 2015-09-28 | 858-267-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG MRMS | CA |
| 2015-09-22 | 858-413-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | POWAY | CA |
| 2015-09-17 | 858-732-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | LA JOLLA | CA |
| 2015-09-16 | 858-987-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG LVTA | CA |
| 2015-09-09 | 858-261-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DEL MAR | CA |
| 2015-09-03 | 858-987-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2015-09-03 | 858-987-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2015-08-26 | 858-247-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2015-08-26 | 858-257-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2015-08-24 | 858-987-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNDG LVTA | CA |
| 2015-08-14 | 858-262-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | SNDG LVTA | CA |
| 2015-08-14 | 858-262-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | SNDG LVTA | CA |
| 2015-08-12 | 858-265-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-08-12 | 858-265-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | 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.