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 817
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-09-23 | 817-508-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EULESS | TX |
| 2015-06-08 | 817-893-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NRICHLDHLS | TX |
| 2015-04-02 | 817-969-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | KENNEDALE | TX |
| 2014-11-05 | 817-539-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MANSFIELD | TX |
| 2014-09-04 | 817-785-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EULESS | TX |
| 2014-07-22 | 817-767-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ROANOKE | TX |
| 2014-05-22 | 817-770-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NRICHLDHLS | TX |
| 2013-09-04 | 817-349-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FORT WORTH | TX |
| 2013-06-13 | 817-615-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FORT WORTH | TX |
| 2013-04-01 | 817-782-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FORT WORTH | TX |
| 2011-05-05 | 817-672-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | KENNEDALE | TX |
| 2011-04-20 | 817-508-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EULESS | TX |
| 2011-01-18 | 817-567-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ROANOKE | TX |
| 2010-12-28 | 817-862-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FORT WORTH | TX |
| 2010-11-05 | 817-402-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ALVARADO | TX |
| 2010-09-22 | 817-642-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ARLINGTON | TX |
| 2010-08-25 | 817-576-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NRICHLDHLS | TX |
| 2010-04-12 | 817-583-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ARLINGTON | TX |
| 2010-03-04 | 817-592-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MANSFIELD | TX |
| 2010-02-24 | 817-494-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EULESS | TX |
| 2009-11-23 | 817-576-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NRICHLDHLS | TX |
| 2009-11-03 | 817-538-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ARLINGTON | TX |
| 2009-07-15 | 817-482-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | KELLER | TX |
| 2009-07-06 | 817-203-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GRAPEVINE | TX |
| 2006-11-09 | 817-526-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CLEBURNE | TX |
| 2006-11-09 | 817-757-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WEATHERFD | TX |
| 2006-11-09 | 817-964-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GRANBURY | TX |
| 2006-06-15 | 817-378-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FORT WORTH | TX |
| 2006-06-15 | 817-538-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ARLINGTON | TX |
| 2006-06-09 | 817-494-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EULESS | TX |
| 2006-02-01 | 817-516-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | KENNEDALE | TX |
| 2006-02-01 | 817-537-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ATLAS | TX |
| 2006-02-01 | 817-576-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NRICHLDHLS | TX |
| 2006-01-18 | 817-653-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GLENDALE | 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.