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 |
|---|---|---|---|---|---|---|---|
| 2014-05-06 | 858-223-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
| 2014-05-06 | 858-223-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
| 2014-04-24 | 858-519-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DEL MAR | CA |
| 2014-04-24 | 858-654-5XXX | 5000–5999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | SNDG LVTA | CA |
| 2014-04-23 | 858-369-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | DEL MAR | CA |
| 2014-04-22 | 858-281-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2014-04-11 | 858-766-9XXX | 9000–9999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | LA JOLLA | CA |
| 2014-04-10 | 858-275-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2014-04-08 | 858-275-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2014-04-07 | 858-260-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2014-04-07 | 858-260-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2014-04-04 | 858-360-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RNCHOPNQTS | CA |
| 2014-04-02 | 858-240-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOPNQTS | CA |
| 2014-04-02 | 858-324-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOPNQTS | CA |
| 2014-04-02 | 858-536-0XXX | 0000–0999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SNDG MRMS | CA |
| 2014-04-01 | 858-465-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DEL MAR | CA |
| 2014-04-01 | 858-924-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RNCHOBRNDO | CA |
| 2014-03-19 | 858-437-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG MRMS | CA |
| 2014-03-17 | 858-324-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | RNCHOPNQTS | CA |
| 2014-03-17 | 858-602-4XXX | 4000–4999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | POWAY | CA |
| 2014-03-17 | 858-649-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | RNCHOBRNDO | CA |
| 2014-02-28 | 858-771-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOSANFE | CA |
| 2014-02-28 | 858-771-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOSANFE | CA |
| 2014-02-24 | 858-260-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2014-02-11 | 858-397-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2014-02-11 | 858-924-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RNCHOBRNDO | CA |
| 2014-02-11 | 858-935-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2014-02-07 | 858-465-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL MAR | CA |
| 2014-01-28 | 858-465-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DEL MAR | CA |
| 2014-01-22 | 858-465-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | DEL MAR | CA |
| 2014-01-22 | 858-465-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | DEL MAR | CA |
| 2014-01-21 | 858-314-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7147 | DEL MAR | CA |
| 2014-01-21 | 858-695-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG MRMS | CA |
| 2014-01-06 | 858-260-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2013-12-19 | 858-324-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOPNQTS | CA |
| 2013-12-10 | 858-688-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2013-12-10 | 858-880-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2013-12-10 | 858-935-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2013-11-20 | 858-223-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | SNDG LVTA | CA |
| 2013-11-08 | 858-266-2XXX | 2000–2999 | Assigned | PACIFIC BELL | 9740 | SNDG LVTA | CA |
| 2013-11-08 | 858-266-3XXX | 3000–3999 | Assigned | PACIFIC BELL | 9740 | SNDG LVTA | CA |
| 2013-11-08 | 858-266-4XXX | 4000–4999 | Assigned | PACIFIC BELL | 9740 | SNDG LVTA | CA |
| 2013-11-08 | 858-266-5XXX | 5000–5999 | Assigned | PACIFIC BELL | 9740 | SNDG LVTA | CA |
| 2013-11-08 | 858-266-6XXX | 6000–6999 | Assigned | PACIFIC BELL | 9740 | SNDG LVTA | CA |
| 2013-11-08 | 858-266-7XXX | 7000–7999 | Assigned | PACIFIC BELL | 9740 | SNDG LVTA | CA |
| 2013-11-04 | 858-397-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2013-11-04 | 858-408-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2013-11-01 | 858-879-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | RNCHOBRNDO | CA |
| 2013-11-01 | 858-879-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | RNCHOBRNDO | CA |
| 2013-11-01 | 858-924-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | RNCHOBRNDO | 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.