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 309
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-03-06 | 309-850-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ILLINOISCY | IL |
| 2025-03-06 | 309-910-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EDGINGTON | IL |
| 2025-03-06 | 309-969-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MOLINE | IL |
| 2025-03-05 | 309-970-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EASTMOLINE | IL |
| 2024-10-14 | 309-400-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ROCKISLAND | IL |
| 2024-08-13 | 309-880-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | IPAVA | IL |
| 2024-08-13 | 309-942-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SAN JOSE | IL |
| 2024-07-16 | 309-632-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DELAVAN | IL |
| 2023-09-04 | 309-704-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TRIVOLI | IL |
| 2012-01-11 | 309-425-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FIATT | IL |
| 2011-08-10 | 309-228-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FARMINGTON | IL |
| 2011-08-10 | 309-518-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LEWISTOWN | IL |
| 2011-08-10 | 309-884-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HANNA CITY | IL |
| 2011-08-10 | 309-889-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SPRING BAY | IL |
| 2010-09-21 | 309-435-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CANTON | IL |
| 2005-04-07 | 309-643-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PEORIA | IL |
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.