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 805
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-09-03 | 805-638-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SIMIVALLEY | CA |
| 2013-01-24 | 805-438-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SANMARGART | CA |
| 2012-02-07 | 805-210-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SIMIVALLEY | CA |
| 2012-01-18 | 805-855-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PIRU | CA |
| 2011-11-11 | 805-395-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CAMBRIA | CA |
| 2011-11-10 | 805-510-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CARRISA PL | CA |
| 2011-11-10 | 805-591-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PASOROBLES | CA |
| 2011-11-10 | 805-776-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MORRO BAY | CA |
| 2011-11-10 | 805-931-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NIPOMO | CA |
| 2011-11-10 | 805-936-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PISMOBEACH | CA |
| 2011-11-10 | 805-995-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CAYUCOS | CA |
| 2011-11-09 | 805-538-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ATASCADERO | CA |
| 2011-11-09 | 805-994-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ARROYOGRND | CA |
| 2011-05-26 | 805-613-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | OAKVIEW | CA |
| 2008-08-07 | 805-633-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | OJAI | CA |
| 2008-08-07 | 805-667-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VNTRA CNTL | CA |
| 2006-10-19 | 805-625-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FILLMORE | CA |
| 2006-04-11 | 805-535-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VNTRA EAST | CA |
| 2006-04-11 | 805-552-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MOORPARK | CA |
| 2006-02-06 | 805-624-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SIMIVALLEY | CA |
| 2005-04-08 | 805-752-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SNLUSOBSPO | 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.