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 |
|---|---|---|---|---|---|---|---|
| 2022-02-24 | 731-273-6XXX | 6000–6999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | HUMBOLDT | TN |
| 2022-02-24 | 731-388-6XXX | 6000–6999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | HUMBOLDT | TN |
| 2022-02-23 | 731-244-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | SELMER | TN |
| 2022-02-23 | 731-273-2XXX | 2000–2999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | HUMBOLDT | TN |
| 2022-02-23 | 731-656-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MAURY CITY | TN |
| 2022-02-22 | 731-242-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | HUNTINGDON | TN |
| 2022-02-22 | 731-467-8XXX | 8000–8999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | JACKSON | TN |
| 2022-02-22 | 731-543-3XXX | 3000–3999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | PARIS | TN |
| 2022-02-22 | 731-766-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | TRENTON | TN |
| 2022-02-21 | 731-741-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BROWNSVL | TN |
| 2022-02-03 | 731-507-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | UNION CITY | TN |
| 2022-02-03 | 731-507-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | UNION CITY | TN |
| 2022-01-27 | 731-603-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BETHEL SPG | TN |
| 2022-01-27 | 731-741-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BROWNSVL | TN |
| 2022-01-20 | 731-260-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | HENNING | TN |
| 2022-01-20 | 731-474-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | GIBSON | TN |
| 2022-01-20 | 731-732-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | GRAND JCT | TN |
| 2022-01-20 | 731-788-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | MICHIE | TN |
| 2022-01-07 | 731-246-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | UNION CITY | TN |
| 2022-01-07 | 731-507-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | UNION CITY | TN |
| 2022-01-05 | 731-944-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | SO FULTON | TN |
| 2022-01-04 | 731-238-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | MILAN | TN |
| 2022-01-04 | 731-244-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | SELMER | TN |
| 2022-01-04 | 731-246-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | UNION CITY | TN |
| 2022-01-04 | 731-274-6XXX | 6000–6999 | Assigned | WEST KENTUCKY & TENNESSEE TELECOMMUNICATIONS CO-OP | 337J | SIDONIA | TN |
| 2022-01-04 | 731-275-4XXX | 4000–4999 | Assigned | WEST KENTUCKY & TENNESSEE TELECOMMUNICATIONS CO-OP | 337J | PALMERSVL | TN |
| 2022-01-04 | 731-331-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BOLIVAR | TN |
| 2022-01-04 | 731-432-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | BROWNSVL | TN |
| 2022-01-04 | 731-458-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SAVANNAH | TN |
| 2022-01-04 | 731-460-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | RIPLEY | TN |
| 2022-01-04 | 731-666-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | CAMDEN | TN |
| 2022-01-04 | 731-730-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | HENDERSON | TN |
| 2022-01-04 | 731-747-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | HUMBOLDT | TN |
| 2022-01-04 | 731-800-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | LEXINGTON | TN |
| 2021-12-28 | 731-931-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | DYERSBURG | TN |
| 2021-12-28 | 731-931-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | DYERSBURG | TN |
| 2021-12-23 | 731-868-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | JACKSON | TN |
| 2021-12-23 | 731-931-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | DYERSBURG | TN |
| 2021-12-17 | 731-313-2XXX | 2000–2999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | JACKSON | TN |
| 2021-12-17 | 731-313-3XXX | 3000–3999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | JACKSON | TN |
| 2021-12-17 | 731-313-4XXX | 4000–4999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | JACKSON | TN |
| 2021-12-17 | 731-313-5XXX | 5000–5999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | JACKSON | TN |
| 2021-12-15 | 731-242-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | HUNTINGDON | TN |
| 2021-12-15 | 731-273-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | HUMBOLDT | TN |
| 2021-12-15 | 731-730-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | HENDERSON | TN |
| 2021-12-14 | 731-432-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BROWNSVL | TN |
| 2021-12-14 | 731-600-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | MCKENZIE | TN |
| 2021-12-14 | 731-666-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | CAMDEN | TN |
| 2021-12-07 | 731-389-6XXX | 6000–6999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | UNION CITY | TN |
| 2021-12-02 | 731-910-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | 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.