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 |
|---|---|---|---|---|---|---|---|
| 2016-06-14 | 858-329-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG MRMS | CA |
| 2016-06-13 | 858-299-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2016-06-13 | 858-299-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2016-06-13 | 858-376-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOBRNDO | CA |
| 2016-06-13 | 858-682-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | POWAY | CA |
| 2016-06-13 | 858-682-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | POWAY | CA |
| 2016-06-10 | 858-276-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG LVTA | CA |
| 2016-06-10 | 858-299-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | DEL MAR | CA |
| 2016-06-10 | 858-834-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOPNQTS | CA |
| 2016-06-10 | 858-842-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | POWAY | CA |
| 2016-06-06 | 858-951-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOSANFE | CA |
| 2016-05-18 | 858-203-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | LA JOLLA | CA |
| 2016-05-18 | 858-757-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SNDG MRMS | CA |
| 2016-05-16 | 858-276-2XXX | 2000–2999 | Assigned | HD CARRIER LLC | 321J | SNDG LVTA | CA |
| 2016-05-16 | 858-276-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | SNDG LVTA | CA |
| 2016-05-16 | 858-276-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | SNDG LVTA | CA |
| 2016-05-16 | 858-276-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | SNDG LVTA | CA |
| 2016-05-16 | 858-276-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | SNDG LVTA | CA |
| 2016-05-06 | 858-299-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | DEL MAR | CA |
| 2016-05-06 | 858-299-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | DEL MAR | CA |
| 2016-05-02 | 858-299-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | DEL MAR | CA |
| 2016-04-26 | 858-299-4XXX | 4000–4999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | DEL MAR | CA |
| 2016-04-11 | 858-221-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SNDG LVTA | CA |
| 2016-03-24 | 858-203-4XXX | 4000–4999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | LA JOLLA | CA |
| 2016-03-14 | 858-312-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RNCHOBRNDO | CA |
| 2016-03-08 | 858-757-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2016-03-08 | 858-757-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2016-03-08 | 858-757-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2016-03-08 | 858-757-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2016-03-08 | 858-757-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2016-03-07 | 858-276-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNDG LVTA | CA |
| 2016-03-03 | 858-716-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RNCHOBRNDO | CA |
| 2016-02-29 | 858-203-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2016-02-26 | 858-276-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2016-02-26 | 858-276-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2016-02-23 | 858-927-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7147 | RNCHOBRNDO | CA |
| 2016-02-19 | 858-203-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | LA JOLLA | CA |
| 2016-02-12 | 858-203-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2016-02-12 | 858-203-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2016-01-29 | 858-757-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2016-01-29 | 858-757-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2016-01-27 | 858-203-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2016-01-27 | 858-261-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | DEL MAR | CA |
| 2016-01-27 | 858-261-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | DEL MAR | CA |
| 2016-01-26 | 858-923-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOSANFE | CA |
| 2016-01-26 | 858-923-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOSANFE | CA |
| 2016-01-26 | 858-927-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOBRNDO | CA |
| 2016-01-26 | 858-927-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOBRNDO | CA |
| 2016-01-26 | 858-987-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
| 2016-01-26 | 858-987-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | 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.