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 |
|---|---|---|---|---|---|---|---|
| 2024-11-21 | 858-420-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-11-21 | 858-420-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-11-21 | 858-420-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-11-21 | 858-420-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-11-21 | 858-420-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-11-21 | 858-420-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-11-21 | 858-420-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-11-21 | 858-420-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-11-21 | 858-420-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-11-21 | 858-420-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-11-13 | 858-419-1XXX | 1000–1999 | Assigned | NUSO, LLC | 478J | SNDG SNDG | CA |
| 2024-11-12 | 858-417-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NATIONALCY | CA |
| 2024-11-12 | 858-417-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NATIONALCY | CA |
| 2024-11-12 | 858-417-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NATIONALCY | CA |
| 2024-11-12 | 858-417-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NATIONALCY | CA |
| 2024-10-31 | 858-288-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG MRMS | CA |
| 2024-10-24 | 858-416-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA MESA | CA |
| 2024-10-24 | 858-416-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA MESA | CA |
| 2024-10-22 | 858-403-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | POWAY | CA |
| 2024-10-22 | 858-588-5XXX | 5000–5999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | RNCHOBRNDO | CA |
| 2024-10-16 | 858-723-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA MESA | CA |
| 2024-10-14 | 858-287-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-10-14 | 858-287-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-10-14 | 858-378-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-10-14 | 858-378-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-10-14 | 858-378-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-10-14 | 858-378-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-10-14 | 858-392-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-10-14 | 858-392-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-10-14 | 858-392-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-10-14 | 858-471-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-10-14 | 858-471-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-10-14 | 858-471-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-10-14 | 858-471-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG MRMS | CA |
| 2024-10-14 | 858-742-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-10-14 | 858-742-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2024-10-09 | 858-422-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | CORONADO | CA |
| 2024-09-26 | 858-387-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA MESA | CA |
| 2024-09-26 | 858-393-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2024-09-26 | 858-393-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2024-09-19 | 858-415-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7147 | SNDG SNDG | CA |
| 2024-09-19 | 858-415-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG SNDG | CA |
| 2024-09-19 | 858-415-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG SNDG | CA |
| 2024-09-19 | 858-415-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG SNDG | CA |
| 2024-09-19 | 858-415-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG SNDG | CA |
| 2024-09-19 | 858-415-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG SNDG | CA |
| 2024-09-19 | 858-415-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG SNDG | CA |
| 2024-09-17 | 858-409-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-09-17 | 858-409-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-09-17 | 858-409-8XXX | 8000–8999 | 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.