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 936
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2023-06-02 | 936-758-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CHIRENO | TX |
| 2012-01-13 | 936-427-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CENTER | TX |
| 2011-11-14 | 936-241-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MADISONVL | TX |
| 2011-10-28 | 936-254-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TIMPSON | TX |
| 2011-10-28 | 936-288-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SANAUGUSTN | TX |
| 2011-10-28 | 936-372-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WALLER | TX |
| 2011-10-28 | 936-857-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PRAIRIE VW | TX |
| 2011-05-24 | 936-205-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NACOGDOCHS | TX |
| 2011-01-07 | 936-257-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DAYTON | TX |
| 2011-01-07 | 936-417-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CORRIGAN | TX |
| 2010-02-23 | 936-439-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HUNTSVILLE | TX |
| 2009-12-04 | 936-253-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LIBERTY | 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.