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 |
|---|---|---|---|---|---|---|---|
| 2017-10-30 | 731-315-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | ADAMSVILLE | TN |
| 2017-10-27 | 731-630-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BROWNSVL | TN |
| 2017-09-28 | 731-666-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | CAMDEN | TN |
| 2017-09-28 | 731-800-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | LEXINGTON | TN |
| 2017-09-28 | 731-800-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | LEXINGTON | TN |
| 2017-09-19 | 731-458-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | SAVANNAH | TN |
| 2017-09-08 | 731-879-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | HENDERSON | TN |
| 2017-08-30 | 731-608-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | HENDERSON | TN |
| 2017-06-30 | 731-298-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | JACKSON | TN |
| 2017-06-23 | 731-273-9XXX | 9000–9999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | HUMBOLDT | TN |
| 2017-06-22 | 731-244-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | SELMER | TN |
| 2017-06-13 | 731-462-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEDINA | TN |
| 2017-06-07 | 731-798-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LEXINGTON | TN |
| 2017-05-03 | 731-793-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | HUNTINGDON | TN |
| 2017-04-14 | 731-315-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | ADAMSVILLE | TN |
| 2017-03-22 | 731-229-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | PARIS | TN |
| 2017-03-22 | 731-244-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | SELMER | TN |
| 2017-03-17 | 731-316-7XXX | 7000–7999 | Assigned | TELNYX LLC | 073H | LEXINGTON | TN |
| 2017-03-17 | 731-324-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | RIPLEY | TN |
| 2017-03-17 | 731-361-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | BOLIVAR | TN |
| 2017-03-17 | 731-458-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | SAVANNAH | TN |
| 2017-03-17 | 731-507-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | UNION CITY | TN |
| 2017-03-17 | 731-519-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | BROWNSVL | TN |
| 2017-03-17 | 731-747-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | HUMBOLDT | TN |
| 2017-03-17 | 731-777-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | DYERSBURG | TN |
| 2017-03-17 | 731-792-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | HUNTINGDON | TN |
| 2017-03-17 | 731-891-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | JACKSON | TN |
| 2017-03-01 | 731-888-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | BIG SANDY | TN |
| 2017-02-27 | 731-236-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | GRAND JCT | TN |
| 2017-02-27 | 731-236-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | GRAND JCT | TN |
| 2017-02-27 | 731-419-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | RIPLEY | TN |
| 2017-02-27 | 731-513-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | JACKSON | TN |
| 2017-02-15 | 731-319-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TIPTONVL | TN |
| 2017-02-09 | 731-330-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | TRENTON | TN |
| 2017-02-08 | 731-507-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | UNION CITY | TN |
| 2017-02-03 | 731-540-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2017-02-03 | 731-540-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2017-01-04 | 731-460-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | RIPLEY | TN |
| 2016-12-22 | 731-501-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | BELLS | TN |
| 2016-12-21 | 731-265-6XXX | 6000–6999 | Assigned | JACKSON ENERGY AUTHORITY - TN | 150G | JACKSON | TN |
| 2016-12-12 | 731-201-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | BIG SANDY | TN |
| 2016-12-01 | 731-574-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | JACKSON | TN |
| 2016-11-14 | 731-507-0XXX | 0000–0999 | Assigned | JACKSON ENERGY AUTHORITY - TN | 150G | UNION CITY | TN |
| 2016-11-01 | 731-747-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | HUMBOLDT | TN |
| 2016-10-21 | 731-220-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CAMDEN | TN |
| 2016-10-21 | 731-221-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RIPLEY | TN |
| 2016-10-21 | 731-318-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MILAN | TN |
| 2016-10-19 | 731-316-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | LEXINGTON | TN |
| 2016-10-14 | 731-628-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | NEWBERN | TN |
| 2016-10-05 | 731-330-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TRENTON | 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.