NumberResearchRecent thousands-block assignments
5 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, last 30 days — NPA 731
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Jan 2026
Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2004-11-24 | 731-439-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SELMER | TN |
| 2004-11-24 | 731-607-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SAVANNAH | TN |
| 2004-11-24 | 731-614-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | LEXINGTON | TN |
| 2004-11-23 | 731-609-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BOLIVAR | TN |
| 2004-11-23 | 731-609-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BOLIVAR | TN |
| 2004-11-22 | 731-256-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | JACKSON | TN |
| 2004-11-04 | 731-907-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | HORNBEAK | TN |
| 2004-11-03 | 731-393-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MCKENZIE | TN |
| 2004-11-03 | 731-451-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | HENNING | TN |
| 2004-11-03 | 731-472-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MIDDLETON | TN |
| 2004-11-03 | 731-474-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | GIBSON | TN |
| 2004-11-03 | 731-483-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | DYER | TN |
| 2004-11-03 | 731-503-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NEWBERN | TN |
| 2004-11-03 | 731-577-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | BETHEL SPG | TN |
| 2004-11-03 | 731-624-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | TROY | TN |
| 2004-11-03 | 731-732-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | GRAND JCT | TN |
| 2004-11-03 | 731-859-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | WHITEVILLE | TN |
| 2004-11-03 | 731-903-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | HALLS | TN |
| 2004-11-03 | 731-937-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | KENTON | TN |
| 2004-10-21 | 731-613-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MILAN | TN |
| 2004-10-21 | 731-707-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | BIG SANDY | TN |
| 2004-10-13 | 731-707-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BIG SANDY | TN |
| 2004-09-22 | 731-256-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
| 2004-06-23 | 731-595-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | HENDERSON | TN |
| 2003-09-24 | 731-882-9XXX | 9000–9999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | DYERSBURG | TN |
| — | 731-252-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BRUCETON | TN |
| — | 731-404-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | BRADFORD | TN |
| — | 731-703-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SHARON | 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.