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 |
|---|---|---|---|---|---|---|---|
| 2014-04-04 | 731-501-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BELLS | TN |
| 2014-04-04 | 731-503-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | NEWBERN | TN |
| 2014-04-04 | 731-519-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BROWNSVL | TN |
| 2014-04-04 | 731-577-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BETHEL SPG | TN |
| 2014-04-04 | 731-618-5XXX | 5000–5999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | HUMBOLDT | TN |
| 2014-04-04 | 731-678-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | GREENFIELD | TN |
| 2014-04-04 | 731-681-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | GLEASON | TN |
| 2014-04-04 | 731-732-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | GRAND JCT | TN |
| 2014-04-04 | 731-792-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | HUNTINGDON | TN |
| 2014-04-04 | 731-798-4XXX | 4000–4999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | LEXINGTON | TN |
| 2014-04-04 | 731-837-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MIDDLETON | TN |
| 2014-04-04 | 731-859-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | WHITEVILLE | TN |
| 2014-04-04 | 731-903-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | HALLS | TN |
| 2014-04-04 | 731-907-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | HORNBEAK | TN |
| 2014-04-04 | 731-937-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | KENTON | TN |
| 2014-03-27 | 731-419-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | RIPLEY | TN |
| 2014-03-27 | 731-736-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | JACKSON | TN |
| 2014-03-13 | 731-624-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | TROY | TN |
| 2014-03-13 | 731-859-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | WHITEVILLE | TN |
| 2014-03-12 | 731-327-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MICHIE | TN |
| 2014-03-12 | 731-472-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | MIDDLETON | TN |
| 2014-03-12 | 731-577-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BETHEL SPG | TN |
| 2014-03-12 | 731-903-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | HALLS | TN |
| 2014-03-03 | 731-506-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | JACKSON | TN |
| 2014-02-20 | 731-388-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | HUMBOLDT | TN |
| 2014-01-16 | 731-506-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | JACKSON | TN |
| 2014-01-14 | 731-618-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | HUMBOLDT | TN |
| 2013-12-30 | 731-621-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | GREENFIELD | TN |
| 2013-12-27 | 731-337-9XXX | 9000–9999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | HUMBOLDT | TN |
| 2013-10-23 | 731-474-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GIBSON | TN |
| 2013-10-07 | 731-432-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | BROWNSVL | TN |
| 2013-10-07 | 731-504-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | UNION CITY | TN |
| 2013-10-04 | 731-400-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SAVANNAH | TN |
| 2013-09-20 | 731-203-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | BOLIVAR | TN |
| 2013-09-16 | 731-227-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2013-08-28 | 731-227-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | PARIS | TN |
| 2013-08-06 | 731-671-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | RIPLEY | TN |
| 2013-08-05 | 731-393-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | MCKENZIE | TN |
| 2013-06-26 | 731-599-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | UNION CITY | TN |
| 2013-05-31 | 731-500-1XXX | 1000–1999 | Assigned | TENNESSEE TEL. CO. | 0575 | PARSONS | TN |
| 2013-05-29 | 731-434-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | SELMER | TN |
| 2013-05-24 | 731-439-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | SELMER | TN |
| 2013-05-20 | 731-337-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | HUMBOLDT | TN |
| 2013-05-13 | 731-259-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | DYERSBURG | TN |
| 2013-05-10 | 731-243-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | HENRY | TN |
| 2013-05-03 | 731-238-3XXX | 3000–3999 | Assigned | JACKSON ENERGY AUTHORITY - TN | 150G | MILAN | TN |
| 2013-04-30 | 731-630-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | BROWNSVL | TN |
| 2013-04-24 | 731-238-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MILAN | TN |
| 2013-04-16 | 731-400-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | SAVANNAH | TN |
| 2013-04-15 | 731-407-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | PARIS | 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.