NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 760
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-08-30 | 760-943-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ENCINITAS | CA |
| 2014-08-06 | 760-891-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SAN MARCOS | CA |
| 2011-10-04 | 760-487-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ENCINITAS | CA |
| 2011-09-14 | 760-354-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CALIPATRIA | CA |
| 2011-09-14 | 760-356-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HOLTVILLE | CA |
| 2011-09-14 | 760-358-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | OCOTILLO | CA |
| 2011-09-14 | 760-527-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | JULIAN | CA |
| 2011-09-14 | 760-545-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | IMPERIAL | CA |
| 2011-06-08 | 760-618-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CALEXICO | CA |
| 2011-03-24 | 760-659-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VISTA | CA |
| 2011-02-15 | 760-849-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BAKER | CA |
| 2011-01-18 | 760-615-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PAUMA VLY | CA |
| 2010-08-17 | 760-453-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | OCSD OCSD | CA |
| 2009-12-14 | 760-623-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BRAWLEY | CA |
| 2006-11-21 | 760-693-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EL CENTRO | CA |
| 2006-11-01 | 760-539-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SAN MARCOS | CA |
| 2006-11-01 | 760-748-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BORREGO | CA |
| 2006-10-31 | 760-913-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VALLEY CTR | CA |
| 2006-04-11 | 760-451-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FALLBROOK | CA |
| 2006-04-11 | 760-654-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | RAMONA | CA |
| 2006-03-10 | 760-452-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ENCINITAS | CA |
| 2006-03-10 | 760-512-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | OCSD PDTN | CA |
| 2006-03-10 | 760-696-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | OCSD OCSD | CA |
| 2006-03-10 | 760-814-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | OCSD CRLS | CA |
| 2006-03-10 | 760-975-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ESCONDIDO | CA |
| 2005-03-25 | 760-536-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VISTA | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.