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 956
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-07-11 | 956-747-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BROWNSVL | TX |
| 2012-11-12 | 956-567-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EDCOUCH | TX |
| 2012-11-12 | 956-772-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PORTISABEL | TX |
| 2012-11-12 | 956-923-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SAN BENITO | TX |
| 2011-11-14 | 956-628-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ENCINAL | TX |
| 2011-09-28 | 956-396-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FALCON HTS | TX |
| 2011-08-30 | 956-254-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LOSFRESNOS | TX |
| 2011-08-30 | 956-265-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ZAPATA | TX |
| 2011-08-30 | 956-294-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MERCEDES | TX |
| 2011-08-30 | 956-329-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EDINBURG | TX |
| 2011-08-30 | 956-395-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | RIO HONDO | TX |
| 2011-08-30 | 956-485-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SULLIVANCY | TX |
| 2011-08-30 | 956-529-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MISSION | TX |
| 2011-08-30 | 956-685-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PHARR | TX |
| 2011-06-21 | 956-734-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HARLINGEN | TX |
| 2011-05-25 | 956-800-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MCALLEN | TX |
| 2010-09-17 | 956-274-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DONNA | TX |
| 2009-11-04 | 956-462-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LAREDO | TX |
| 2006-07-21 | 956-372-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BROWNSVL | 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.