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
Aug 2026
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Jun 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-06-05 | 858-402-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2024-03-27 | 858-283-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2023-09-12 | 858-321-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG SNDG | CA |
| 2022-08-24 | 858-644-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG MRMS | CA |
| 2022-04-27 | 858-665-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2022-01-27 | 858-665-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2021-12-14 | 858-355-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG SNDG | CA |
| 2021-07-22 | 858-323-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CHULAVISTA | CA |
| 2021-07-21 | 858-477-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG SNDG | CA |
| 2021-06-30 | 858-868-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG SNDG | CA |
| 2021-06-29 | 858-868-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG SNDG | CA |
| 2021-06-29 | 858-868-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG SNDG | CA |
| 2021-06-07 | 858-868-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG SNDG | CA |
| 2021-05-19 | 858-910-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CHULAVISTA | CA |
| 2021-02-16 | 858-727-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG SNDG | CA |
| 2021-01-06 | 858-727-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG SNDG | CA |
| 2019-12-26 | 858-868-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG SNDG | CA |
| 2019-09-11 | 858-388-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | EL CAJON | CA |
| 2018-10-11 | 858-302-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG LVTA | CA |
| 2018-08-29 | 858-258-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG MRMS | CA |
| 2018-08-29 | 858-258-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG MRMS | CA |
| 2018-06-07 | 858-258-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG MRMS | CA |
| 2016-07-11 | 858-250-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2016-07-11 | 858-250-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2016-07-07 | 858-322-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG MRMS | CA |
| 2016-06-27 | 858-203-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2016-03-03 | 858-716-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RNCHOBRNDO | CA |
| 2015-11-11 | 858-261-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DEL MAR | CA |
| 2015-08-06 | 858-257-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2015-07-24 | 858-291-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2015-02-27 | 858-266-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG LVTA | CA |
| 2014-11-20 | 858-779-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RNCHOSANFE | CA |
| 2014-10-01 | 858-257-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2014-10-01 | 858-257-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2014-08-01 | 858-281-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2014-08-01 | 858-281-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2014-07-17 | 858-284-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DEL MAR | CA |
| 2014-07-17 | 858-284-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DEL MAR | CA |
| 2014-07-10 | 858-275-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG MRMS | CA |
| 2014-07-10 | 858-281-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2014-06-26 | 858-223-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG LVTA | CA |
| 2014-06-26 | 858-924-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RNCHOBRNDO | CA |
| 2014-06-13 | 858-275-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG MRMS | CA |
| 2014-04-24 | 858-519-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DEL MAR | CA |
| 2014-04-22 | 858-281-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2014-04-04 | 858-360-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RNCHOPNQTS | CA |
| 2014-03-19 | 858-437-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNDG MRMS | CA |
| 2014-02-24 | 858-260-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LA JOLLA | CA |
| 2014-02-11 | 858-924-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RNCHOBRNDO | CA |
| 2014-01-28 | 858-465-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | 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.