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 407
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 |
|---|---|---|---|---|---|---|---|
| 2016-08-30 | 407-820-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ORLANDO | FL |
| 2016-08-30 | 407-820-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ORLANDO | FL |
| 2016-06-20 | 407-634-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ORLANDO | FL |
| 2016-05-12 | 407-871-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SANFORD | FL |
| 2015-08-20 | 407-458-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ORLANDO | FL |
| 2015-01-26 | 407-969-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ORLANDO | FL |
| 2014-06-25 | 407-734-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ORLANDO | FL |
| 2014-06-17 | 407-278-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | OVIEDO | FL |
| 2014-04-02 | 407-801-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ORLANDO | FL |
| 2013-10-23 | 407-942-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SANFORD | FL |
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.