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 626
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-12-23 | 626-787-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PSDN PSDN | CA |
| 2014-10-13 | 626-741-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ALHAMBRA | CA |
| 2014-04-22 | 626-219-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PSDN PSDN | CA |
| 2013-05-14 | 626-460-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PSDN PSDN | CA |
| 2011-09-01 | 626-940-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ALHAMBRA | CA |
| 2011-05-26 | 626-416-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EL MONTE | CA |
| 2010-11-12 | 626-639-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PSDN PSDN | CA |
| 2006-03-09 | 626-538-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ARCADIA | CA |
| 2006-03-09 | 626-703-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ALHAMBRA | CA |
| 2005-05-13 | 626-345-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PSDN PSDN | 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.