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 440
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-07-01 | 440-266-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MENTOR | OH |
| 2015-11-16 | 440-502-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VICTORY | OH |
| 2015-04-02 | 440-459-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HILLCREST | OH |
| 2015-02-17 | 440-856-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WILLOUGHBY | OH |
| 2014-09-22 | 440-853-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PAINESVL | OH |
| 2014-09-11 | 440-641-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TRINITY | OH |
| 2013-04-15 | 440-340-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VICTORY | OH |
| 2011-08-08 | 440-607-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LEROY | OH |
| 2011-01-07 | 440-606-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | KIRTLAND | OH |
| 2011-01-07 | 440-682-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BURTON | OH |
| 2009-12-07 | 440-252-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BEDFORD | OH |
| 2009-10-05 | 440-793-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | OLMSTEDFLS | OH |
| 2008-06-13 | 440-688-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CHESTERLD | OH |
| 2006-11-06 | 440-448-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GATESMILLS | OH |
| 2006-06-13 | 440-565-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HILLCREST | OH |
| 2006-06-08 | 440-579-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PAINESVL | OH |
| 2006-03-13 | 440-268-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | STRONGSVL | OH |
| 2006-03-13 | 440-457-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NOROYALTON | OH |
| 2006-03-13 | 440-494-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WICKLIFFE | OH |
| 2006-03-13 | 440-532-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BEREA | OH |
| 2006-03-13 | 440-736-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BRECKSVL | OH |
| 2006-01-12 | 440-747-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VICTORY | OH |
| 2005-12-29 | 440-290-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MENTOR | OH |
| 2005-08-29 | 440-394-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CHAGRINFLS | OH |
| 2005-07-27 | 440-385-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TRINITY | OH |
| 2005-05-31 | 440-525-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WILLOUGHBY | OH |
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.