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 512
New assignments by month
Sep 2026
Aug 2026
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Jun 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-04-02 | 512-953-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2015-01-15 | 512-770-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2014-09-17 | 512-645-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2014-09-17 | 512-792-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2014-09-02 | 512-840-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2014-09-02 | 512-840-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2014-07-16 | 512-838-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2011-10-28 | 512-564-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LAMPASAS | TX |
| 2011-09-28 | 512-575-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SMITHVILLE | TX |
| 2011-09-01 | 512-362-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2011-06-21 | 512-352-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TAYLOR | TX |
| 2011-06-06 | 512-666-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2011-05-25 | 512-543-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ROCKDALE | TX |
| 2011-05-25 | 512-778-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LIBERTY HL | TX |
| 2010-12-16 | 512-520-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2010-12-16 | 512-520-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2010-09-10 | 512-518-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2010-07-29 | 512-861-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2010-06-03 | 512-337-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LEANDER | TX |
| 2010-05-05 | 512-368-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2010-01-18 | 512-761-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2010-01-18 | 512-761-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2009-12-03 | 512-714-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ADAMSVILLE | TX |
| 2009-11-03 | 512-551-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2009-10-16 | 512-412-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BASTROP | TX |
| 2009-06-23 | 512-551-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2009-06-23 | 512-551-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2009-04-08 | 512-551-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2008-12-09 | 512-712-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2008-09-23 | 512-712-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2006-11-13 | 512-229-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ELGIN | TX |
| 2006-11-13 | 512-668-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LOCKHART | TX |
| 2006-01-18 | 512-337-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LEANDER | TX |
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.