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 |
|---|---|---|---|---|---|---|---|
| 2014-12-01 | 731-307-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | LEXINGTON | TN |
| 2014-11-24 | 731-325-1XXX | 1000–1999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | DYERSBURG | TN |
| 2014-11-24 | 731-410-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | JACKSON | TN |
| 2014-10-22 | 731-474-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | GIBSON | TN |
| 2014-10-10 | 731-468-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CAMDEN | TN |
| 2014-10-09 | 731-207-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MCKENZIE | TN |
| 2014-10-01 | 731-300-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | JACKSON | TN |
| 2014-10-01 | 731-388-7XXX | 7000–7999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | HUMBOLDT | TN |
| 2014-10-01 | 731-462-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | MEDINA | TN |
| 2014-09-26 | 731-506-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JACKSON | TN |
| 2014-09-26 | 731-513-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JACKSON | TN |
| 2014-09-16 | 731-300-7XXX | 7000–7999 | Assigned | JACKSON ENERGY AUTHORITY - TN | 150G | JACKSON | TN |
| 2014-09-10 | 731-333-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | PARIS | TN |
| 2014-09-10 | 731-412-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | SAVANNAH | TN |
| 2014-08-22 | 731-203-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BOLIVAR | TN |
| 2014-08-18 | 731-249-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | LEXINGTON | TN |
| 2014-07-22 | 731-326-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BROWNSVL | TN |
| 2014-07-08 | 731-227-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2014-07-07 | 731-435-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | HENDERSON | TN |
| 2014-06-27 | 731-868-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | JACKSON | TN |
| 2014-06-13 | 731-599-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | UNION CITY | TN |
| 2014-05-19 | 731-503-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | NEWBERN | TN |
| 2014-05-13 | 731-203-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BOLIVAR | TN |
| 2014-05-06 | 731-886-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | UNION CITY | TN |
| 2014-05-01 | 731-617-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | BELLS | TN |
| 2014-05-01 | 731-632-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ADAMSVILLE | TN |
| 2014-05-01 | 731-689-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SHILOH | TN |
| 2014-04-23 | 731-687-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MILLEDGEVL | TN |
| 2014-04-17 | 731-736-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JACKSON | TN |
| 2014-04-07 | 731-400-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | SAVANNAH | TN |
| 2014-04-07 | 731-470-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | TRENTON | TN |
| 2014-04-07 | 731-592-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | UNION CITY | TN |
| 2014-04-07 | 731-623-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | TIPTONVL | TN |
| 2014-04-07 | 731-624-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | TROY | TN |
| 2014-04-04 | 731-201-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BIG SANDY | TN |
| 2014-04-04 | 731-203-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BOLIVAR | TN |
| 2014-04-04 | 731-203-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BOLIVAR | TN |
| 2014-04-04 | 731-214-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | CEDARGROVE | TN |
| 2014-04-04 | 731-227-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | PARIS | TN |
| 2014-04-04 | 731-238-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MILAN | TN |
| 2014-04-04 | 731-259-5XXX | 5000–5999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DYERSBURG | TN |
| 2014-04-04 | 731-393-2XXX | 2000–2999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MCKENZIE | TN |
| 2014-04-04 | 731-419-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | RIPLEY | TN |
| 2014-04-04 | 731-435-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | HENDERSON | TN |
| 2014-04-04 | 731-442-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | RIDGELY | TN |
| 2014-04-04 | 731-451-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | HENNING | TN |
| 2014-04-04 | 731-462-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MEDINA | TN |
| 2014-04-04 | 731-468-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | CAMDEN | TN |
| 2014-04-04 | 731-474-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | GIBSON | TN |
| 2014-04-04 | 731-483-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DYER | 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.