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
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 |
|---|---|---|---|---|---|---|---|
| 2024-01-09 | 731-928-5XXX | 5000–5999 | Assigned | COMMIO, LLC | 939H | JACKSON | TN |
| 2024-01-09 | 731-928-6XXX | 6000–6999 | Assigned | COMMIO, LLC | 939H | JACKSON | TN |
| 2024-01-09 | 731-928-7XXX | 7000–7999 | Assigned | COMMIO, LLC | 939H | JACKSON | TN |
| 2024-01-09 | 731-928-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | JACKSON | TN |
| 2024-01-09 | 731-928-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | JACKSON | TN |
| 2022-11-04 | 731-503-6XXX | 6000–6999 | Assigned | COMMIO, LLC | 939H | NEWBERN | TN |
| 2022-10-25 | 731-867-5XXX | 5000–5999 | Assigned | COMMIO, LLC | 939H | PARIS | TN |
| 2022-10-25 | 731-867-6XXX | 6000–6999 | Assigned | COMMIO, LLC | 939H | PARIS | TN |
| 2022-10-25 | 731-867-7XXX | 7000–7999 | Assigned | COMMIO, LLC | 939H | PARIS | TN |
| 2022-10-25 | 731-867-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | PARIS | TN |
| 2022-10-07 | 731-800-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | LEXINGTON | TN |
| 2022-07-13 | 731-737-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | DYERSBURG | TN |
| 2022-05-11 | 731-434-6XXX | 6000–6999 | Assigned | COMMIO, LLC | 939H | SELMER | TN |
| 2022-03-02 | 731-600-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | MCKENZIE | TN |
| 2021-08-02 | 731-633-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | JACKSON | TN |
| 2021-08-02 | 731-633-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | JACKSON | TN |
| 2021-08-02 | 731-633-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | JACKSON | TN |
| 2021-08-02 | 731-633-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | JACKSON | 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.