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 731
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-09-17 | 731-282-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | NEWBERN | TN |
| 2025-09-17 | 731-737-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | DYERSBURG | TN |
| 2024-02-21 | 731-532-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | BETHEL SPG | TN |
| 2023-11-30 | 731-244-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SELMER | TN |
| 2023-11-21 | 731-770-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | WHITEVILLE | TN |
| 2023-07-31 | 731-837-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MIDDLETON | TN |
| 2023-01-10 | 731-732-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | GRAND JCT | TN |
| 2012-06-21 | 731-223-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SO FULTON | TN |
| 2012-06-21 | 731-324-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RIPLEY | TN |
| 2012-06-21 | 731-442-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RIDGELY | TN |
| 2012-06-21 | 731-451-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | HENNING | TN |
| 2012-06-21 | 731-470-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | TRENTON | TN |
| 2012-06-21 | 731-483-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | DYER | TN |
| 2012-06-21 | 731-665-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RUTHERFORD | TN |
| 2012-06-21 | 731-903-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | HALLS | TN |
| 2012-06-21 | 731-907-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | HORNBEAK | TN |
| 2012-06-21 | 731-937-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | KENTON | TN |
| 2012-06-18 | 731-741-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | BROWNSVL | TN |
| 2006-02-08 | 731-212-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | BOLIVAR | TN |
| 2005-12-06 | 731-623-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | TIPTONVL | TN |
| — | 731-404-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | BRADFORD | TN |
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.