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 |
|---|---|---|---|---|---|---|---|
| 2006-09-27 | 858-652-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | LA JOLLA | CA |
| 2006-09-27 | 858-652-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | LA JOLLA | CA |
| 2006-09-27 | 858-768-6XXX | 6000–6999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | LA JOLLA | CA |
| 2006-09-26 | 858-397-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG MRMS | CA |
| 2006-09-19 | 858-217-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RNCHOBRNDO | CA |
| 2006-09-19 | 858-240-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RNCHOPNQTS | CA |
| 2006-09-19 | 858-356-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | DEL MAR | CA |
| 2006-09-19 | 858-367-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RNCHOSANFE | CA |
| 2006-09-19 | 858-368-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNDG MRMS | CA |
| 2006-09-19 | 858-384-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNDG LVTA | CA |
| 2006-09-19 | 858-391-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | POWAY | CA |
| 2006-09-19 | 858-634-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA |
| 2006-09-18 | 858-633-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG LVTA | CA |
| 2006-09-13 | 858-207-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | RNCHOBRNDO | CA |
| 2006-09-13 | 858-776-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RNCHOBRNDO | CA |
| 2006-09-01 | 858-750-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA |
| 2006-09-01 | 858-750-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA |
| 2006-08-28 | 858-216-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | RNCHOPNQTS | CA |
| 2006-08-10 | 858-568-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2006-08-10 | 858-568-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2006-08-10 | 858-568-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2006-08-10 | 858-568-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2006-08-10 | 858-568-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2006-08-10 | 858-568-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2006-08-10 | 858-568-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2006-08-09 | 858-668-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | POWAY | CA |
| 2006-08-04 | 858-353-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DEL MAR | CA |
| 2006-08-04 | 858-353-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DEL MAR | CA |
| 2006-08-04 | 858-367-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RNCHOSANFE | CA |
| 2006-08-04 | 858-539-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2006-08-04 | 858-784-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2006-08-04 | 858-909-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2006-07-24 | 858-952-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | LA JOLLA | CA |
| 2006-07-20 | 858-952-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2006-07-18 | 858-380-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG LVTA | CA |
| 2006-07-18 | 858-750-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2006-07-18 | 858-750-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2006-07-18 | 858-750-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2006-07-14 | 858-877-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2006-07-11 | 858-360-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOPNQTS | CA |
| 2006-07-11 | 858-369-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | DEL MAR | CA |
| 2006-07-11 | 858-537-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2006-07-11 | 858-602-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | POWAY | CA |
| 2006-07-11 | 858-633-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
| 2006-07-07 | 858-901-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOPNQTS | CA |
| 2006-07-05 | 858-225-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG MRMS | CA |
| 2006-06-23 | 858-413-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POWAY | CA |
| 2006-06-23 | 858-413-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POWAY | CA |
| 2006-06-07 | 858-527-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2006-06-07 | 858-527-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | 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.