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 |
|---|---|---|---|---|---|---|---|
| 2011-11-04 | 731-201-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BIG SANDY | TN |
| 2011-10-27 | 731-595-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | HENDERSON | TN |
| 2011-09-28 | 731-300-3XXX | 3000–3999 | Assigned | JACKSON ENERGY AUTHORITY - TN | 150G | JACKSON | TN |
| 2011-09-28 | 731-300-4XXX | 4000–4999 | Assigned | JACKSON ENERGY AUTHORITY - TN | 150G | JACKSON | TN |
| 2011-09-12 | 731-470-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | TRENTON | TN |
| 2011-09-09 | 731-259-3XXX | 3000–3999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | DYERSBURG | TN |
| 2011-08-24 | 731-281-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | MARTIN | TN |
| 2011-08-24 | 731-407-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2011-08-24 | 731-462-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MEDINA | TN |
| 2011-08-17 | 731-213-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CAMDEN | TN |
| 2011-08-17 | 731-214-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CEDARGROVE | TN |
| 2011-08-17 | 731-238-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MILAN | TN |
| 2011-08-17 | 731-412-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SAVANNAH | TN |
| 2011-08-17 | 731-442-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | RIDGELY | TN |
| 2011-08-17 | 731-470-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TRENTON | TN |
| 2011-08-17 | 731-483-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DYER | TN |
| 2011-08-17 | 731-503-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NEWBERN | TN |
| 2011-08-17 | 731-535-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HUNTINGDON | TN |
| 2011-08-17 | 731-577-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BETHEL SPG | TN |
| 2011-08-17 | 731-599-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | UNION CITY | TN |
| 2011-08-17 | 731-602-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LEXINGTON | TN |
| 2011-08-17 | 731-623-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TIPTONVL | TN |
| 2011-08-17 | 731-624-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TROY | TN |
| 2011-08-17 | 731-907-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HORNBEAK | TN |
| 2011-08-17 | 731-937-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | KENTON | TN |
| 2011-08-11 | 731-238-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | MILAN | TN |
| 2011-08-02 | 731-337-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | HUMBOLDT | TN |
| 2011-08-02 | 731-393-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | MCKENZIE | TN |
| 2011-08-01 | 731-259-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | DYERSBURG | TN |
| 2011-08-01 | 731-337-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | HUMBOLDT | TN |
| 2011-08-01 | 731-393-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | MCKENZIE | TN |
| 2011-08-01 | 731-506-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JACKSON | TN |
| 2011-08-01 | 731-518-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BOLIVAR | TN |
| 2011-08-01 | 731-592-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | UNION CITY | TN |
| 2011-08-01 | 731-602-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | LEXINGTON | TN |
| 2011-08-01 | 731-792-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | HUNTINGDON | TN |
| 2011-07-21 | 731-613-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MILAN | TN |
| 2011-07-07 | 731-293-1XXX | 1000–1999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | JACKSON | TN |
| 2011-07-07 | 731-345-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | BELLS | TN |
| 2011-07-01 | 731-277-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | BROWNSVL | TN |
| 2011-06-10 | 731-300-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | JACKSON | TN |
| 2011-06-07 | 731-389-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | UNION CITY | TN |
| 2011-05-27 | 731-727-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SAVANNAH | TN |
| 2011-05-25 | 731-277-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BROWNSVL | TN |
| 2011-05-24 | 731-213-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | CAMDEN | TN |
| 2011-05-24 | 731-227-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2011-05-03 | 731-389-8XXX | 8000–8999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | UNION CITY | TN |
| 2011-04-29 | 731-326-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BROWNSVL | TN |
| 2011-04-29 | 731-337-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HUMBOLDT | TN |
| 2011-04-29 | 731-345-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BELLS | 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.