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 310
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-02-16 | 310-554-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN CMTN | CA |
| 2015-07-28 | 310-431-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | INGLEWOOD | CA |
| 2013-06-10 | 310-921-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | REDONDO | CA |
| 2013-03-19 | 310-504-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | REDONDO | CA |
| 2013-03-12 | 310-627-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN CMTN | CA |
| 2013-03-12 | 310-730-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CULVERCITY | CA |
| 2012-12-21 | 310-881-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNMN MRVS | CA |
| 2011-04-26 | 310-935-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SAN PEDRO | CA |
| 2009-10-27 | 310-438-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN CMTN | CA |
| 2009-10-27 | 310-438-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN CMTN | CA |
| 2009-10-27 | 310-438-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN CMTN | CA |
| 2009-10-27 | 310-756-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN GRDN | CA |
| 2009-10-27 | 310-876-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CULVERCITY | CA |
| 2009-10-27 | 310-876-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CULVERCITY | CA |
| 2009-10-27 | 310-910-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | INGLEWOOD | CA |
| 2009-10-22 | 310-439-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNMN MRVS | CA |
| 2009-05-22 | 310-400-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN GRDN | CA |
| 2008-06-27 | 310-437-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNMN MRVS | CA |
| 2008-05-30 | 310-425-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CULVERCITY | CA |
| 2008-03-27 | 310-684-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SAN PEDRO | CA |
| 2008-03-27 | 310-872-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SAN PEDRO | CA |
| 2007-12-20 | 310-310-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNMN SNMN | CA |
| 2007-12-20 | 310-310-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNMN SNMN | CA |
| 2006-12-05 | 310-310-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNMN SNMN | CA |
| 2006-08-29 | 310-648-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | EL SEGUNDO | CA |
| 2006-08-29 | 310-817-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN GRDN | CA |
| 2006-08-29 | 310-817-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN GRDN | CA |
| 2006-08-09 | 310-751-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNMN MRVS | CA |
| 2001-02-07 | 310-439-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNMN MRVS | 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.