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 |
|---|---|---|---|---|---|---|---|
| 2011-06-30 | 858-848-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | POWAY | CA |
| 2011-06-30 | 858-848-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | POWAY | CA |
| 2011-06-30 | 858-848-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | POWAY | CA |
| 2011-06-30 | 858-859-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | POWAY | CA |
| 2011-06-30 | 858-859-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | POWAY | CA |
| 2011-06-30 | 858-859-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | POWAY | CA |
| 2011-06-30 | 858-859-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | POWAY | CA |
| 2011-06-30 | 858-859-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | POWAY | CA |
| 2011-06-20 | 858-242-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2011-06-20 | 858-242-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2011-06-17 | 858-255-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | LA JOLLA | CA |
| 2011-06-07 | 858-255-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LA JOLLA | CA |
| 2011-06-07 | 858-255-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LA JOLLA | CA |
| 2011-06-07 | 858-255-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LA JOLLA | CA |
| 2011-06-07 | 858-255-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LA JOLLA | CA |
| 2011-06-02 | 858-255-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | LA JOLLA | CA |
| 2011-06-01 | 858-397-6XXX | 6000–6999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SNDG MRMS | CA |
| 2011-05-05 | 858-430-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SNDG LVTA | CA |
| 2011-04-28 | 858-215-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOPNQTS | CA |
| 2011-04-28 | 858-215-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOPNQTS | CA |
| 2011-04-28 | 858-218-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | POWAY | CA |
| 2011-04-28 | 858-255-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | LA JOLLA | CA |
| 2011-04-28 | 858-304-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOBRNDO | CA |
| 2011-04-28 | 858-375-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | POWAY | CA |
| 2011-04-28 | 858-381-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOSANFE | CA |
| 2011-04-28 | 858-432-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOBRNDO | CA |
| 2011-04-28 | 858-461-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2011-04-28 | 858-519-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2011-04-28 | 858-522-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG LVTA | CA |
| 2011-04-28 | 858-609-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG LVTA | CA |
| 2011-04-28 | 858-617-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2011-04-28 | 858-617-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2011-04-28 | 858-621-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG MRMS | CA |
| 2011-04-28 | 858-634-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG LVTA | CA |
| 2011-04-28 | 858-751-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG LVTA | CA |
| 2011-04-28 | 858-880-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG MRMS | CA |
| 2011-04-28 | 858-935-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG MRMS | CA |
| 2011-03-31 | 858-352-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LA JOLLA | CA |
| 2011-03-31 | 858-815-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RNCHOBRNDO | CA |
| 2011-03-26 | 858-860-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SNDG MRMS | CA |
| 2011-03-24 | 858-999-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2011-03-24 | 858-999-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2011-03-16 | 858-914-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RNCHOSANFE | CA |
| 2011-03-14 | 858-999-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2011-03-11 | 858-240-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RNCHOPNQTS | CA |
| 2011-03-11 | 858-999-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | LA JOLLA | CA |
| 2011-03-08 | 858-433-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNDG MRMS | CA |
| 2011-03-02 | 858-381-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOSANFE | CA |
| 2011-03-02 | 858-888-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2011-03-02 | 858-999-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | 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.