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 731
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-05-08 | 731-233-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GREENFIELD | TN |
| 2024-05-03 | 731-877-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GLEASON | TN |
| 2013-10-23 | 731-474-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GIBSON | TN |
| 2013-01-28 | 731-451-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HENNING | TN |
| 2012-11-27 | 731-435-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HENDERSON | TN |
| 2011-11-14 | 731-944-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SO FULTON | TN |
| 2011-08-24 | 731-462-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MEDINA | TN |
| 2011-08-17 | 731-213-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CAMDEN | TN |
| 2011-08-17 | 731-214-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CEDARGROVE | TN |
| 2011-08-17 | 731-238-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MILAN | TN |
| 2011-08-17 | 731-412-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SAVANNAH | TN |
| 2011-08-17 | 731-442-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | RIDGELY | TN |
| 2011-08-17 | 731-470-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TRENTON | TN |
| 2011-08-17 | 731-483-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DYER | TN |
| 2011-08-17 | 731-503-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NEWBERN | TN |
| 2011-08-17 | 731-535-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HUNTINGDON | TN |
| 2011-08-17 | 731-577-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BETHEL SPG | TN |
| 2011-08-17 | 731-599-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | UNION CITY | TN |
| 2011-08-17 | 731-602-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LEXINGTON | TN |
| 2011-08-17 | 731-623-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TIPTONVL | TN |
| 2011-08-17 | 731-624-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TROY | TN |
| 2011-08-17 | 731-907-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HORNBEAK | TN |
| 2011-08-17 | 731-937-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | KENTON | TN |
| 2011-06-10 | 731-300-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | JACKSON | TN |
| 2011-04-29 | 731-326-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BROWNSVL | TN |
| 2011-04-29 | 731-337-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HUMBOLDT | TN |
| 2011-04-29 | 731-345-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BELLS | TN |
| 2011-04-29 | 731-393-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MCKENZIE | TN |
| 2011-04-29 | 731-707-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BIG SANDY | TN |
| 2011-04-29 | 731-837-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MIDDLETON | TN |
| 2011-04-29 | 731-859-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WHITEVILLE | TN |
| 2011-04-29 | 731-903-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HALLS | TN |
| 2010-01-06 | 731-236-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GRAND JCT | TN |
| 2010-01-06 | 731-982-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SELMER | TN |
| 2009-09-28 | 731-924-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PARIS | TN |
| 2009-08-18 | 731-478-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DYERSBURG | TN |
| 2009-08-18 | 731-518-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BOLIVAR | TN |
| 2009-05-04 | 731-327-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MICHIE | TN |
| 2009-04-24 | 731-419-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | RIPLEY | TN |
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.