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 606
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-08-19 | 606-323-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | INEZ | KY |
| 2024-08-19 | 606-370-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CRAB ORCH | KY |
| 2024-08-19 | 606-390-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WARFIELD | KY |
| 2024-08-19 | 606-414-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ELKHORN CY | KY |
| 2024-08-19 | 606-421-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FEDSCREEK | KY |
| 2024-08-19 | 606-442-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | JELLICO | KY |
| 2024-08-19 | 606-450-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MCCARR | KY |
| 2024-08-19 | 606-466-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NEON | KY |
| 2024-08-19 | 606-530-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MARTIN | KY |
| 2024-08-15 | 606-322-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ALLEN | KY |
| 2014-06-24 | 606-357-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MCDOWELL | KY |
| 2013-01-28 | 606-208-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BEATTYVL | KY |
| 2013-01-28 | 606-263-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PRESTONSBG | KY |
| 2013-01-28 | 606-284-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WAYLAND | KY |
| 2013-01-28 | 606-483-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LOUISA | KY |
| 2013-01-28 | 606-519-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | STONE | KY |
| 2013-01-28 | 606-536-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WHITESBURG | KY |
| 2013-01-28 | 606-554-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VIRGIE | KY |
| 2013-01-28 | 606-603-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SOWILLIMSN | KY |
| 2013-01-28 | 606-612-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | STANTON | KY |
| 2013-01-28 | 606-671-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WALLINSCRK | KY |
| 2013-01-28 | 606-733-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BENHAMLNCH | KY |
| 2012-11-26 | 606-441-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PINEVILLE | KY |
| 2012-11-26 | 606-896-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MIDDLESBO | KY |
| 2012-11-08 | 606-264-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PAINTSVL | KY |
| 2012-11-08 | 606-510-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | STANFORD | KY |
| 2012-11-08 | 606-621-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HARLAN | KY |
| 2012-11-08 | 606-824-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | JACKSON | KY |
| 2012-01-13 | 606-261-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CORBIN | KY |
| 2011-11-15 | 606-253-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PIKEVILLE | KY |
| 2011-11-15 | 606-407-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MAYSVILLE | KY |
| 2011-11-15 | 606-515-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WILLIAMSBG | KY |
| 2011-03-04 | 606-289-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FREEBURN | KY |
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.