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 937
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 |
|---|---|---|---|---|---|---|---|
| 2016-07-01 | 937-991-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DAYTON | OH |
| 2015-02-25 | 937-979-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DAYTON | OH |
| 2014-09-26 | 937-640-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DAYTON | OH |
| 2013-11-14 | 937-259-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DAYTON | OH |
| 2013-02-01 | 937-402-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HILLSBORO | OH |
| 2012-02-17 | 937-221-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DAYTON | OH |
| 2011-10-27 | 937-504-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SPRINGFLD | OH |
| 2011-10-25 | 937-764-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BELFAST | OH |
| 2011-08-15 | 937-365-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | RAINSBORO | OH |
| 2011-08-15 | 937-392-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | RIPLEY | OH |
| 2011-08-15 | 937-466-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MARSHALL | OH |
| 2011-08-15 | 937-695-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WINCHESTER | OH |
| 2011-08-15 | 937-862-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SPRING VLY | OH |
| 2011-08-15 | 937-882-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DONNELSVL | OH |
| 2011-08-15 | 937-927-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SUGRTRERDG | OH |
| 2011-01-07 | 937-265-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PITCHIN | OH |
| 2011-01-07 | 937-462-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SOCHARLETN | OH |
| 2011-01-07 | 937-568-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SO VIENNA | OH |
| 2011-01-07 | 937-769-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | YLSPGCLFTN | OH |
| 2011-01-07 | 937-883-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SOUTHSOLON | OH |
| 2011-01-07 | 937-964-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NO HAMPTON | OH |
| 2010-12-21 | 937-872-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | JAMESTOWN | OH |
| 2010-12-16 | 937-315-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MEDWAY | OH |
| 2010-12-16 | 937-350-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CENTERVLLE | OH |
| 2010-12-16 | 937-368-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FLTCHELENA | OH |
| 2010-12-16 | 937-453-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BOWERSVLLE | OH |
| 2010-12-16 | 937-697-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CEDARVILLE | OH |
| 2010-12-16 | 937-704-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FRANKLIN | OH |
| 2010-12-16 | 937-857-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CHRISTISBG | OH |
| 2010-12-16 | 937-863-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ENON | OH |
| 2010-01-06 | 937-331-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DAYTON | OH |
| 2009-12-09 | 937-249-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ABERDEEN | OH |
| 2009-10-05 | 937-310-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BELLBROOK | OH |
| 2009-10-05 | 937-562-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | XENIA | OH |
| 2009-10-05 | 937-679-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NEWCARLISL | OH |
| 2009-10-05 | 937-873-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FAIRBORN | OH |
| 2009-10-05 | 937-916-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PIQUA | OH |
| 2008-05-02 | 937-530-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MSBGWCRLTN | OH |
| 2008-04-09 | 937-742-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VANDALIA | OH |
| 2005-08-02 | 937-306-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BEAVERCREK | OH |
| 2005-07-27 | 937-460-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SPRINGFLD | 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.