NumberResearchRecent thousands-block assignments
25 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 |
|---|---|---|---|---|---|---|---|
| 2024-09-17 | 858-409-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-09-16 | 858-406-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-09-16 | 858-406-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-09-16 | 858-406-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-09-16 | 858-406-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-09-16 | 858-406-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-09-16 | 858-406-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-09-06 | 858-878-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | LA MESA | CA |
| 2024-08-30 | 858-407-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CHULAVISTA | CA |
| 2024-08-29 | 858-902-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CHULAVISTA | CA |
| 2024-08-29 | 858-902-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CHULAVISTA | CA |
| 2024-08-26 | 858-317-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DULZURA | CA |
| 2024-08-19 | 858-400-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RNCHOSANFE | CA |
| 2024-08-13 | 858-477-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | SNDG SNDG | CA |
| 2024-07-23 | 858-394-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-07-23 | 858-394-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-07-23 | 858-406-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-07-23 | 858-406-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-07-23 | 858-406-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-07-23 | 858-406-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-07-03 | 858-398-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2024-06-17 | 858-377-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POWAY | CA |
| 2024-06-17 | 858-403-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POWAY | CA |
| 2024-06-05 | 858-402-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2024-06-03 | 858-902-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CHULAVISTA | CA |
| 2024-06-03 | 858-902-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CHULAVISTA | CA |
| 2024-06-03 | 858-902-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CHULAVISTA | CA |
| 2024-06-03 | 858-902-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CHULAVISTA | CA |
| 2024-05-29 | 858-754-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LA JOLLA | CA |
| 2024-05-22 | 858-392-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG LVTA | CA |
| 2024-04-29 | 858-338-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | HARBSNALPN | CA |
| 2024-03-27 | 858-283-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2024-03-25 | 858-392-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG LVTA | CA |
| 2024-03-18 | 858-288-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-03-18 | 858-288-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-03-18 | 858-288-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-03-18 | 858-288-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-03-18 | 858-288-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-03-18 | 858-394-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-03-18 | 858-394-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-03-18 | 858-394-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-03-08 | 858-828-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG SNDG | CA |
| 2024-02-26 | 858-413-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POWAY | CA |
| 2024-02-20 | 858-402-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-02-20 | 858-402-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-02-20 | 858-402-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-02-20 | 858-402-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-02-20 | 858-402-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-02-20 | 858-402-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-02-20 | 858-402-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.