NumberResearchRecent thousands-block assignments
5 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 |
|---|---|---|---|---|---|---|---|
| 2013-03-11 | 731-412-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | SAVANNAH | TN |
| 2013-03-06 | 731-736-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JACKSON | TN |
| 2013-02-01 | 731-388-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | HUMBOLDT | TN |
| 2013-02-01 | 731-419-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | RIPLEY | TN |
| 2013-01-28 | 731-451-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HENNING | TN |
| 2012-12-27 | 731-982-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | SELMER | TN |
| 2012-12-13 | 731-434-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | SELMER | TN |
| 2012-12-13 | 731-504-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | UNION CITY | TN |
| 2012-11-27 | 731-435-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HENDERSON | TN |
| 2012-10-12 | 731-506-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JACKSON | TN |
| 2012-09-24 | 731-238-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | MILAN | TN |
| 2012-09-24 | 731-451-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | HENNING | TN |
| 2012-09-18 | 731-238-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | MILAN | TN |
| 2012-09-18 | 731-535-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | HUNTINGDON | TN |
| 2012-09-05 | 731-924-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2012-08-24 | 731-281-7XXX | 7000–7999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MARTIN | TN |
| 2012-08-14 | 731-468-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | CAMDEN | TN |
| 2012-07-19 | 731-599-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | UNION CITY | TN |
| 2012-06-21 | 731-223-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SO FULTON | TN |
| 2012-06-21 | 731-324-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RIPLEY | TN |
| 2012-06-21 | 731-442-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RIDGELY | TN |
| 2012-06-21 | 731-451-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | HENNING | TN |
| 2012-06-21 | 731-470-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | TRENTON | TN |
| 2012-06-21 | 731-483-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | DYER | TN |
| 2012-06-21 | 731-665-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RUTHERFORD | TN |
| 2012-06-21 | 731-903-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | HALLS | TN |
| 2012-06-21 | 731-907-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | HORNBEAK | TN |
| 2012-06-21 | 731-937-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | KENTON | TN |
| 2012-06-18 | 731-400-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | SAVANNAH | TN |
| 2012-06-18 | 731-741-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | BROWNSVL | TN |
| 2012-06-01 | 731-418-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | HUNTINGDON | TN |
| 2012-06-01 | 731-732-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | GRAND JCT | TN |
| 2012-05-22 | 731-213-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CAMDEN | TN |
| 2012-04-10 | 731-412-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | SAVANNAH | TN |
| 2012-04-02 | 731-300-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | JACKSON | TN |
| 2012-03-28 | 731-798-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | LEXINGTON | TN |
| 2012-03-09 | 731-623-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | TIPTONVL | TN |
| 2012-03-08 | 731-333-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | PARIS | TN |
| 2012-02-29 | 731-298-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | JACKSON | TN |
| 2012-02-29 | 731-298-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | JACKSON | TN |
| 2012-02-14 | 731-259-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | DYERSBURG | TN |
| 2012-01-30 | 731-624-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | TROY | TN |
| 2012-01-10 | 731-442-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | RIDGELY | TN |
| 2012-01-05 | 731-882-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | DYERSBURG | TN |
| 2012-01-04 | 731-412-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SAVANNAH | TN |
| 2012-01-04 | 731-418-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HUNTINGDON | TN |
| 2011-12-28 | 731-678-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | GREENFIELD | TN |
| 2011-12-19 | 731-298-2XXX | 2000–2999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | JACKSON | TN |
| 2011-11-14 | 731-443-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BROWNSVL | TN |
| 2011-11-14 | 731-944-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SO FULTON | TN |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.