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 737
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-09-14 | 737-757-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LEANDER | TX |
| 2016-06-16 | 737-209-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2016-06-16 | 737-209-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2015-10-13 | 737-203-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2015-07-06 | 737-226-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | TX |
| 2014-05-23 | 737-777-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LEANDER | TX |
| 2014-03-24 | 737-703-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AUSTIN | 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.