NumberResearchRecent thousands-block assignments
0 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, all time — NPA 858
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 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 | 858-363-4XXX | 4000–4999 | Assigned | COMMIO, LLC | 939H | JACUMBA | CA |
| 2023-08-10 | 858-317-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | DULZURA | CA |
| 2023-08-10 | 858-317-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | DULZURA | CA |
| 2023-08-10 | 858-317-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | DULZURA | CA |
| 2023-08-10 | 858-317-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | DULZURA | CA |
| 2023-08-10 | 858-317-4XXX | 4000–4999 | Assigned | COMMIO, LLC | 939H | DULZURA | CA |
| 2022-11-03 | 858-363-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | JACUMBA | CA |
| 2022-11-03 | 858-363-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | JACUMBA | CA |
| 2022-11-03 | 858-363-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | JACUMBA | CA |
| 2022-09-19 | 858-838-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | CAMPO | CA |
| 2021-09-22 | 858-944-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | SNDG LVTA | CA |
| 2021-09-22 | 858-944-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | SNDG LVTA | CA |
| 2021-09-22 | 858-944-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | SNDG LVTA | CA |
| 2021-09-22 | 858-944-7XXX | 7000–7999 | Assigned | COMMIO, LLC | 939H | SNDG LVTA | CA |
| 2021-09-16 | 858-377-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | POWAY | CA |
| 2021-09-16 | 858-377-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | POWAY | CA |
| 2021-09-16 | 858-377-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | POWAY | CA |
| 2021-09-16 | 858-377-4XXX | 4000–4999 | Assigned | COMMIO, LLC | 939H | POWAY | CA |
| 2021-09-16 | 858-765-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | LA JOLLA | CA |
| 2021-09-16 | 858-765-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | LA JOLLA | CA |
| 2021-09-16 | 858-765-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | LA JOLLA | CA |
| 2021-09-16 | 858-765-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | LA JOLLA | CA |
| 2021-09-16 | 858-765-5XXX | 5000–5999 | Assigned | COMMIO, LLC | 939H | LA JOLLA | CA |
| 2021-07-30 | 858-323-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | CHULAVISTA | CA |
| 2021-07-30 | 858-323-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | CHULAVISTA | CA |
| 2021-07-30 | 858-323-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | CHULAVISTA | CA |
| 2021-07-30 | 858-323-4XXX | 4000–4999 | Assigned | COMMIO, LLC | 939H | CHULAVISTA | CA |
| 2021-07-30 | 858-323-5XXX | 5000–5999 | Assigned | COMMIO, LLC | 939H | CHULAVISTA | CA |
| 2021-07-30 | 858-855-4XXX | 4000–4999 | Assigned | COMMIO, LLC | 939H | EL CAJON | CA |
| 2021-07-30 | 858-855-6XXX | 6000–6999 | Assigned | COMMIO, LLC | 939H | EL CAJON | CA |
| 2021-07-30 | 858-855-7XXX | 7000–7999 | Assigned | COMMIO, LLC | 939H | EL CAJON | CA |
| 2021-07-30 | 858-855-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | EL CAJON | CA |
| 2021-07-30 | 858-855-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | EL CAJON | CA |
| 2021-05-08 | 858-313-4XXX | 4000–4999 | Assigned | COMMIO, LLC | 939H | DEL MAR | 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.