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 |
|---|---|---|---|---|---|---|---|
| 2010-01-29 | 858-376-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOBRNDO | CA |
| 2010-01-29 | 858-633-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG LVTA | CA |
| 2010-01-29 | 858-633-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG LVTA | CA |
| 2010-01-29 | 858-634-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG LVTA | CA |
| 2010-01-29 | 858-863-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG MRMS | CA |
| 2010-01-29 | 858-863-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG MRMS | CA |
| 2010-01-29 | 858-876-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2010-01-29 | 858-876-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2010-01-29 | 858-876-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2010-01-29 | 858-876-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2010-01-29 | 858-876-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2009-12-09 | 858-480-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2009-12-09 | 858-480-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2009-12-09 | 858-480-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2009-12-09 | 858-480-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2009-12-09 | 858-480-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2009-12-02 | 858-776-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RNCHOBRNDO | CA |
| 2009-11-06 | 858-224-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2009-11-04 | 858-705-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RNCHOBRNDO | CA |
| 2009-11-04 | 858-925-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DEL MAR | CA |
| 2009-10-22 | 858-754-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LA JOLLA | CA |
| 2009-10-22 | 858-869-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LA JOLLA | CA |
| 2009-10-05 | 858-740-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2009-10-01 | 858-480-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DEL MAR | CA |
| 2009-09-18 | 858-866-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2009-09-11 | 858-705-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RNCHOBRNDO | CA |
| 2009-09-04 | 858-429-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | SNDG LVTA | CA |
| 2009-09-02 | 858-876-6XXX | 6000–6999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | DEL MAR | CA |
| 2009-08-25 | 858-461-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | DEL MAR | CA |
| 2009-07-21 | 858-215-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RNCHOPNQTS | CA |
| 2009-07-21 | 858-360-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RNCHOPNQTS | CA |
| 2009-07-13 | 858-202-6XXX | 6000–6999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | LA JOLLA | CA |
| 2009-06-26 | 858-222-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2009-06-25 | 858-461-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | DEL MAR | CA |
| 2009-05-04 | 858-926-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | LA JOLLA | CA |
| 2009-04-02 | 858-776-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RNCHOBRNDO | CA |
| 2009-03-30 | 858-222-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2009-03-30 | 858-633-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
| 2009-03-25 | 858-633-4XXX | 4000–4999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SNDG LVTA | CA |
| 2009-03-23 | 858-222-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2009-03-23 | 858-524-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOBRNDO | CA |
| 2009-03-23 | 858-939-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA |
| 2009-03-12 | 858-609-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SNDG LVTA | CA |
| 2009-03-12 | 858-751-3XXX | 3000–3999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SNDG LVTA | CA |
| 2009-03-12 | 858-810-7XXX | 7000–7999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SNDG LVTA | CA |
| 2009-01-22 | 858-222-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2009-01-22 | 858-726-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | POWAY | CA |
| 2009-01-20 | 858-798-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOBRNDO | CA |
| 2009-01-06 | 858-863-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2008-12-22 | 858-764-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | DEL MAR | 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.