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 |
|---|---|---|---|---|---|---|---|
| 2018-10-30 | 731-278-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CYPRESS | TN |
| 2018-10-25 | 731-224-5XXX | 5000–5999 | Assigned | PEERLESS NETWORK OF TENNESSEE, LLC - TN | 276F | HALLS | TN |
| 2018-10-05 | 731-261-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | MARTIN | TN |
| 2018-10-05 | 731-271-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | SO FULTON | TN |
| 2018-10-05 | 731-274-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | SIDONIA | TN |
| 2018-10-05 | 731-275-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | PALMERSVL | TN |
| 2018-10-05 | 731-276-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | LATHAM | TN |
| 2018-10-05 | 731-341-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | DRESDEN | TN |
| 2018-10-05 | 731-703-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | SHARON | TN |
| 2018-10-03 | 731-437-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JACKSON | TN |
| 2018-09-20 | 731-315-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | ADAMSVILLE | TN |
| 2018-09-11 | 731-318-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | MILAN | TN |
| 2018-09-11 | 731-666-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | CAMDEN | TN |
| 2018-09-11 | 731-879-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | HENDERSON | TN |
| 2018-08-31 | 731-312-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF TENNESSEE, LLC - TN | 276F | CEDARGROVE | TN |
| 2018-08-30 | 731-207-5XXX | 5000–5999 | Assigned | JACKSON ENERGY AUTHORITY - TN | 150G | MCKENZIE | TN |
| 2018-08-30 | 731-229-1XXX | 1000–1999 | Assigned | JACKSON ENERGY AUTHORITY - TN | 150G | PARIS | TN |
| 2018-08-30 | 731-240-1XXX | 1000–1999 | Assigned | JACKSON ENERGY AUTHORITY - TN | 150G | JACKSON | TN |
| 2018-08-30 | 731-666-0XXX | 0000–0999 | Assigned | JACKSON ENERGY AUTHORITY - TN | 150G | CAMDEN | TN |
| 2018-08-20 | 731-281-8XXX | 8000–8999 | Assigned | WEST KENTUCKY & TENNESSEE TELECOMMUNICATIONS CO-OP | 337J | MARTIN | TN |
| 2018-08-20 | 731-341-4XXX | 4000–4999 | Assigned | WEST KENTUCKY & TENNESSEE TELECOMMUNICATIONS CO-OP | 337J | DRESDEN | TN |
| 2018-08-15 | 731-241-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2018-08-15 | 731-241-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2018-08-15 | 731-241-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2018-08-15 | 731-243-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | HENRY | TN |
| 2018-07-09 | 731-241-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2018-07-09 | 731-241-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2018-06-18 | 731-888-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF TENNESSEE, LLC - TN | 276F | BIG SANDY | TN |
| 2018-05-07 | 731-244-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | SELMER | TN |
| 2018-05-04 | 731-478-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | DYERSBURG | TN |
| 2018-05-04 | 731-497-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | RIDGELY | TN |
| 2018-04-20 | 731-296-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | TRIMBLE | TN |
| 2018-03-27 | 731-243-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | HENRY | TN |
| 2018-03-09 | 731-229-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2018-03-09 | 731-229-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2018-03-05 | 731-656-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MAURY CITY | TN |
| 2018-03-05 | 731-662-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ATWOOD | TN |
| 2018-03-05 | 731-669-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | TREZEVANT | TN |
| 2018-03-05 | 731-696-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ALAMO | TN |
| 2018-02-28 | 731-777-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | DYERSBURG | TN |
| 2018-02-15 | 731-888-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | BIG SANDY | TN |
| 2018-02-14 | 731-207-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | MCKENZIE | TN |
| 2018-02-06 | 731-361-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | BOLIVAR | TN |
| 2018-02-01 | 731-513-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | JACKSON | TN |
| 2018-02-01 | 731-513-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | JACKSON | TN |
| 2018-01-02 | 731-699-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | DRESDEN | TN |
| 2017-12-12 | 731-467-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | JACKSON | TN |
| 2017-11-30 | 731-274-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SIDONIA | TN |
| 2017-11-30 | 731-275-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | PALMERSVL | TN |
| 2017-11-30 | 731-276-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | LATHAM | 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.