NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 915
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-05-24 | 915-259-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EL PASO | TX |
| 2015-04-02 | 915-303-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EL PASO | TX |
| 2014-12-19 | 915-303-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EL PASO | TX |
| 2014-09-15 | 915-270-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EL PASO | TX |
| 2014-06-06 | 915-260-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EL PASO | TX |
| 2013-12-27 | 915-228-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EL PASO | TX |
| 2011-09-12 | 915-207-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VINTON | TX |
| 2011-09-01 | 915-600-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EL PASO | TX |
| 2010-12-20 | 915-249-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EL PASO | TX |
| 2009-11-18 | 915-234-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EL PASO | TX |
| 2009-11-04 | 915-243-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CANUTILLO | TX |
| 2008-06-26 | 915-974-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CLINT | TX |
| 2005-04-15 | 915-345-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EL PASO | TX |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.