NumberResearchRecent thousands-block assignments
17 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 |
|---|---|---|---|---|---|---|---|
| 2017-07-18 | 858-282-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2017-07-18 | 858-285-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2017-07-18 | 858-432-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RNCHOBRNDO | CA |
| 2017-07-17 | 858-209-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DEL MAR | CA |
| 2017-07-17 | 858-291-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2017-06-29 | 858-285-4XXX | 4000–4999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | SNDG LVTA | CA |
| 2017-06-28 | 858-285-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | SNDG LVTA | CA |
| 2017-06-06 | 858-716-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RNCHOBRNDO | CA |
| 2017-05-23 | 858-324-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | RNCHOPNQTS | CA |
| 2017-05-23 | 858-779-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | RNCHOSANFE | CA |
| 2017-05-22 | 858-209-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL MAR | CA |
| 2017-05-12 | 858-203-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2017-05-12 | 858-282-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2017-05-12 | 858-371-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOPNQTS | CA |
| 2017-05-12 | 858-376-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOBRNDO | CA |
| 2017-05-12 | 858-746-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | POWAY | CA |
| 2017-04-26 | 858-285-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7147 | SNDG LVTA | CA |
| 2017-04-14 | 858-282-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2017-04-14 | 858-282-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2017-04-10 | 858-285-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2017-04-05 | 858-285-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7147 | SNDG LVTA | CA |
| 2017-03-14 | 858-280-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | DEL MAR | CA |
| 2017-03-14 | 858-280-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL MAR | CA |
| 2017-03-14 | 858-283-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | LA JOLLA | CA |
| 2017-03-14 | 858-285-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | SNDG LVTA | CA |
| 2017-03-14 | 858-437-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | SNDG MRMS | CA |
| 2017-03-14 | 858-726-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | POWAY | CA |
| 2017-03-14 | 858-946-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | RNCHOBRNDO | CA |
| 2017-03-03 | 858-285-2XXX | 2000–2999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SNDG LVTA | CA |
| 2017-02-24 | 858-283-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | LA JOLLA | CA |
| 2017-02-24 | 858-883-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | POWAY | CA |
| 2017-02-17 | 858-221-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
| 2017-02-17 | 858-221-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
| 2017-02-17 | 858-221-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
| 2017-02-17 | 858-280-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | DEL MAR | CA |
| 2017-02-17 | 858-283-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2017-02-17 | 858-381-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOSANFE | CA |
| 2017-02-07 | 858-499-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | SNDG LVTA | CA |
| 2017-01-23 | 858-221-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SNDG LVTA | CA |
| 2017-01-12 | 858-280-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL MAR | CA |
| 2016-12-27 | 858-329-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2016-12-07 | 858-883-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | POWAY | CA |
| 2016-12-06 | 858-221-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2016-12-06 | 858-322-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2016-11-10 | 858-280-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL MAR | CA |
| 2016-10-31 | 858-280-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DEL MAR | CA |
| 2016-10-24 | 858-283-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2016-10-14 | 858-280-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | DEL MAR | CA |
| 2016-10-12 | 858-283-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2016-10-12 | 858-283-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | 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.