NumberResearchRecent thousands-block assignments
5 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, last 30 days — NPA 731
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2006-02-08 | 731-212-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | BOLIVAR | TN |
| 2006-01-31 | 731-256-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | JACKSON | TN |
| 2006-01-31 | 731-325-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | DYERSBURG | TN |
| 2006-01-31 | 731-434-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | SELMER | TN |
| 2006-01-31 | 731-435-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | HENDERSON | TN |
| 2006-01-31 | 731-438-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | SAVANNAH | TN |
| 2006-01-31 | 731-671-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | RIPLEY | TN |
| 2005-12-30 | 731-681-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GLEASON | TN |
| 2005-12-12 | 731-438-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SAVANNAH | TN |
| 2005-12-07 | 731-271-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SO FULTON | TN |
| 2005-12-07 | 731-540-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | PARIS | TN |
| 2005-12-06 | 731-419-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | RIPLEY | TN |
| 2005-12-06 | 731-623-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | TIPTONVL | TN |
| 2005-11-30 | 731-535-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | HUNTINGDON | TN |
| 2005-11-22 | 731-678-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GREENFIELD | TN |
| 2005-11-09 | 731-213-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CAMDEN | TN |
| 2005-11-09 | 731-249-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LEXINGTON | TN |
| 2005-11-09 | 731-345-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BELLS | TN |
| 2005-11-09 | 731-393-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MCKENZIE | TN |
| 2005-11-09 | 731-407-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | PARIS | TN |
| 2005-11-09 | 731-434-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SELMER | TN |
| 2005-11-09 | 731-435-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | HENDERSON | TN |
| 2005-11-09 | 731-438-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SAVANNAH | TN |
| 2005-11-09 | 731-474-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GIBSON | TN |
| 2005-11-09 | 731-577-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BETHEL SPG | TN |
| 2005-11-09 | 731-599-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | UNION CITY | TN |
| 2005-11-09 | 731-613-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MILAN | TN |
| 2005-11-09 | 731-624-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | TROY | TN |
| 2005-11-04 | 731-736-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JACKSON | TN |
| 2005-10-27 | 731-439-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SELMER | TN |
| 2005-09-20 | 731-734-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BROWNSVL | TN |
| 2005-09-19 | 731-256-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | JACKSON | TN |
| 2005-07-15 | 731-438-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SAVANNAH | TN |
| 2005-06-30 | 731-213-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | CAMDEN | TN |
| 2005-06-30 | 731-707-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | BIG SANDY | TN |
| 2005-06-23 | 731-438-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SAVANNAH | TN |
| 2005-06-23 | 731-439-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SELMER | TN |
| 2005-05-03 | 731-334-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | DYERSBURG | TN |
| 2005-04-20 | 731-472-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MIDDLETON | TN |
| 2005-04-05 | 731-882-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | DYERSBURG | TN |
| 2005-03-28 | 731-220-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CAMDEN | TN |
| 2005-03-28 | 731-438-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SAVANNAH | TN |
| 2005-03-28 | 731-602-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | LEXINGTON | TN |
| 2005-03-28 | 731-612-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | RIPLEY | TN |
| 2005-03-16 | 731-277-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | BROWNSVL | TN |
| 2005-02-16 | 731-212-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BOLIVAR | TN |
| 2005-02-16 | 731-212-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BOLIVAR | TN |
| 2005-02-16 | 731-212-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BOLIVAR | TN |
| 2005-02-16 | 731-882-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | DYERSBURG | TN |
| 2005-02-14 | 731-540-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | PARIS | 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.