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 |
|---|---|---|---|---|---|---|---|
| 2005-11-04 | 858-880-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2005-11-04 | 858-880-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2005-10-28 | 858-356-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DEL MAR | CA |
| 2005-10-28 | 858-356-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DEL MAR | CA |
| 2005-10-19 | 858-527-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2005-10-19 | 858-926-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2005-10-13 | 858-200-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA |
| 2005-10-13 | 858-539-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA |
| 2005-10-12 | 858-926-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2005-10-10 | 858-869-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | LA JOLLA | CA |
| 2005-09-27 | 858-345-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL MAR | CA |
| 2005-09-23 | 858-386-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | POWAY | CA |
| 2005-09-23 | 858-602-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | POWAY | CA |
| 2005-09-23 | 858-602-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | POWAY | CA |
| 2005-09-23 | 858-602-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | POWAY | CA |
| 2005-09-15 | 858-901-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOPNQTS | CA |
| 2005-09-14 | 858-431-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2005-09-14 | 858-539-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2005-09-14 | 858-731-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LA JOLLA | CA |
| 2005-09-12 | 858-309-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA |
| 2005-09-07 | 858-357-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG MRMS | CA |
| 2005-09-06 | 858-769-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG LVTA | CA |
| 2005-08-31 | 858-352-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2005-08-31 | 858-353-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DEL MAR | CA |
| 2005-08-31 | 858-386-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POWAY | CA |
| 2005-08-31 | 858-431-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2005-08-26 | 858-345-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DEL MAR | CA |
| 2005-08-26 | 858-431-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA |
| 2005-08-26 | 858-552-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2005-08-26 | 858-704-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DEL MAR | CA |
| 2005-08-26 | 858-736-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2005-08-25 | 858-324-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOPNQTS | CA |
| 2005-08-25 | 858-368-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG MRMS | CA |
| 2005-08-25 | 858-368-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG MRMS | CA |
| 2005-08-25 | 858-368-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG MRMS | CA |
| 2005-08-25 | 858-380-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA |
| 2005-08-25 | 858-380-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA |
| 2005-08-23 | 858-717-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG LVTA | CA |
| 2005-08-17 | 858-357-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2005-08-17 | 858-437-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2005-08-17 | 858-472-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RNCHOBRNDO | CA |
| 2005-07-26 | 858-386-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POWAY | CA |
| 2005-07-12 | 858-947-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DEL MAR | CA |
| 2005-07-07 | 858-345-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL MAR | CA |
| 2005-07-07 | 858-357-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG MRMS | CA |
| 2005-06-28 | 858-304-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOBRNDO | CA |
| 2005-06-28 | 858-304-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOBRNDO | CA |
| 2005-06-28 | 858-304-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOBRNDO | CA |
| 2005-06-28 | 858-304-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOBRNDO | CA |
| 2005-06-27 | 858-956-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | POWAY | 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.