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 |
|---|---|---|---|---|---|---|---|
| 2024-02-20 | 858-402-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-02-20 | 858-402-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-02-16 | 858-396-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-02-16 | 858-396-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-02-16 | 858-396-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-02-16 | 858-396-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-02-16 | 858-396-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-02-16 | 858-396-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2024-01-29 | 858-341-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CHULAVISTA | CA |
| 2024-01-29 | 858-424-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | EL CAJON | CA |
| 2024-01-26 | 858-396-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2024-01-26 | 858-396-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2024-01-26 | 858-396-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | LA JOLLA | CA |
| 2024-01-25 | 858-287-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2024-01-25 | 858-287-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2024-01-25 | 858-757-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2024-01-25 | 858-757-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2024-01-24 | 858-392-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
| 2024-01-24 | 858-392-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
| 2024-01-24 | 858-394-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
| 2024-01-24 | 858-394-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
| 2024-01-19 | 858-288-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG MRMS | CA |
| 2024-01-11 | 858-389-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CHULAVISTA | CA |
| 2024-01-11 | 858-389-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CHULAVISTA | CA |
| 2024-01-11 | 858-389-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CHULAVISTA | CA |
| 2024-01-10 | 858-394-0XXX | 0000–0999 | Assigned | FIVE9, INC. | 598J | SNDG LVTA | CA |
| 2024-01-05 | 858-387-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | LA MESA | CA |
| 2024-01-05 | 858-387-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | LA MESA | CA |
| 2024-01-05 | 858-387-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | LA MESA | CA |
| 2024-01-05 | 858-387-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | LA MESA | CA |
| 2024-01-02 | 858-387-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | LA MESA | CA |
| 2024-01-02 | 858-387-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | LA MESA | CA |
| 2024-01-02 | 858-387-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | LA MESA | CA |
| 2024-01-02 | 858-392-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | SNDG LVTA | CA |
| 2024-01-02 | 858-392-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | SNDG LVTA | CA |
| 2024-01-02 | 858-393-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | DEL MAR | CA |
| 2024-01-02 | 858-393-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | DEL MAR | CA |
| 2024-01-02 | 858-393-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | DEL MAR | CA |
| 2024-01-02 | 858-393-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | DEL MAR | CA |
| 2024-01-02 | 858-424-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | EL CAJON | CA |
| 2024-01-02 | 858-424-5XXX | 5000–5999 | Assigned | COMMIO, LLC | 939H | EL CAJON | CA |
| 2024-01-02 | 858-424-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | EL CAJON | CA |
| 2024-01-02 | 858-687-6XXX | 6000–6999 | Assigned | COMMIO, LLC | 939H | POWAY | CA |
| 2024-01-02 | 858-687-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | POWAY | CA |
| 2024-01-02 | 858-687-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | POWAY | CA |
| 2024-01-02 | 858-744-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | SNDG SNDG | CA |
| 2023-12-29 | 858-339-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | EL CAJON | CA |
| 2023-12-29 | 858-363-4XXX | 4000–4999 | Assigned | COMMIO, LLC | 939H | JACUMBA | CA |
| 2023-12-13 | 858-389-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CHULAVISTA | CA |
| 2023-12-07 | 858-389-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | CHULAVISTA | 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.