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 |
|---|---|---|---|---|---|---|---|
| 2021-02-16 | 731-433-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | GRAND JCT | TN |
| 2021-02-16 | 731-451-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | HENNING | TN |
| 2021-02-16 | 731-623-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | TIPTONVL | TN |
| 2021-02-16 | 731-699-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | DRESDEN | TN |
| 2021-02-16 | 731-877-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | GLEASON | TN |
| 2021-02-15 | 731-255-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | MARTIN | TN |
| 2021-02-15 | 731-255-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | MARTIN | TN |
| 2021-02-15 | 731-318-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | MILAN | TN |
| 2021-02-15 | 731-318-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | MILAN | TN |
| 2021-02-15 | 731-331-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | BOLIVAR | TN |
| 2021-02-15 | 731-331-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | BOLIVAR | TN |
| 2021-02-15 | 731-458-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | SAVANNAH | TN |
| 2021-02-15 | 731-458-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | SAVANNAH | TN |
| 2021-02-15 | 731-671-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | RIPLEY | TN |
| 2021-02-15 | 731-671-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | RIPLEY | TN |
| 2021-02-11 | 731-229-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2021-02-11 | 731-241-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2021-02-11 | 731-241-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2021-02-11 | 731-241-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2021-02-11 | 731-407-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2021-02-11 | 731-540-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2021-02-11 | 731-924-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2021-02-09 | 731-202-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | BELLS | TN |
| 2020-12-30 | 731-255-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | MARTIN | TN |
| 2020-12-30 | 731-274-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | SIDONIA | TN |
| 2020-12-30 | 731-275-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | PALMERSVL | TN |
| 2020-12-30 | 731-276-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | LATHAM | TN |
| 2020-12-30 | 731-341-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | DRESDEN | TN |
| 2020-12-30 | 731-703-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | SHARON | TN |
| 2020-12-30 | 731-944-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | SO FULTON | TN |
| 2020-12-04 | 731-289-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | MEDINA | TN |
| 2020-12-04 | 731-859-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | WHITEVILLE | TN |
| 2020-12-04 | 731-877-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | GLEASON | TN |
| 2020-11-30 | 731-246-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | UNION CITY | TN |
| 2020-11-17 | 731-227-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | PARIS | TN |
| 2020-11-17 | 731-995-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MILAN | TN |
| 2020-10-29 | 731-944-0XXX | 0000–0999 | Assigned | WEST KENTUCKY RURAL TELEPHONE COOPERATIVE CORPORAT | 584J | SO FULTON | TN |
| 2020-09-06 | 731-327-9XXX | 9000–9999 | Assigned | NUSO, LLC | 478J | MICHIE | TN |
| 2020-08-05 | 731-532-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BETHEL SPG | TN |
| 2020-07-16 | 731-529-3XXX | 3000–3999 | Assigned | FRACTEL, LLC | 965H | MICHIE | TN |
| 2020-07-16 | 731-529-9XXX | 9000–9999 | Assigned | FRACTEL, LLC | 965H | MICHIE | TN |
| 2020-07-09 | 731-244-4XXX | 4000–4999 | Assigned | FRACTEL, LLC | 965H | SELMER | TN |
| 2020-07-09 | 731-500-0XXX | 0000–0999 | Assigned | FRACTEL, LLC | 965H | PARSONS | TN |
| 2020-07-09 | 731-500-5XXX | 5000–5999 | Assigned | FRACTEL, LLC | 965H | PARSONS | TN |
| 2020-07-09 | 731-888-3XXX | 3000–3999 | Assigned | FRACTEL, LLC | 965H | BIG SANDY | TN |
| 2020-07-09 | 731-888-5XXX | 5000–5999 | Assigned | FRACTEL, LLC | 965H | BIG SANDY | TN |
| 2020-07-09 | 731-888-6XXX | 6000–6999 | Assigned | FRACTEL, LLC | 965H | BIG SANDY | TN |
| 2020-07-09 | 731-944-4XXX | 4000–4999 | Assigned | FRACTEL, LLC | 965H | SO FULTON | TN |
| 2020-06-22 | 731-437-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JACKSON | TN |
| 2020-06-11 | 731-900-0XXX | 0000–0999 | Assigned | FRACTEL, LLC | 965H | BIG SANDY | 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.