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 |
|---|---|---|---|---|---|---|---|
| 2007-11-01 | 731-443-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BROWNSVL | TN |
| 2007-10-12 | 731-432-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | BROWNSVL | TN |
| 2007-09-25 | 731-212-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | BOLIVAR | TN |
| 2007-08-22 | 731-439-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SELMER | TN |
| 2007-08-22 | 731-608-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | HENDERSON | TN |
| 2007-06-19 | 731-332-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | MARTIN | TN |
| 2007-05-17 | 731-410-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
| 2007-04-27 | 731-439-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SELMER | TN |
| 2007-04-27 | 731-518-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BOLIVAR | TN |
| 2007-04-27 | 731-727-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SAVANNAH | TN |
| 2007-03-26 | 731-215-8XXX | 8000–8999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | JACKSON | TN |
| 2007-03-21 | 731-438-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SAVANNAH | TN |
| 2007-02-15 | 731-324-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | RIPLEY | TN |
| 2007-02-12 | 731-453-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SELMER | TN |
| 2007-02-12 | 731-518-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BOLIVAR | TN |
| 2007-02-12 | 731-780-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BROWNSVL | TN |
| 2007-02-06 | 731-325-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | DYERSBURG | TN |
| 2007-02-06 | 731-432-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | BROWNSVL | TN |
| 2007-02-01 | 731-256-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | JACKSON | TN |
| 2007-02-01 | 731-256-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | JACKSON | TN |
| 2007-02-01 | 731-256-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | JACKSON | TN |
| 2007-02-01 | 731-256-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | JACKSON | TN |
| 2007-01-31 | 731-206-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SCOTTSHILL | TN |
| 2006-12-15 | 731-727-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SAVANNAH | TN |
| 2006-11-16 | 731-518-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BOLIVAR | TN |
| 2006-10-25 | 731-256-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
| 2006-09-13 | 731-439-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SELMER | TN |
| 2006-09-05 | 731-681-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | GLEASON | TN |
| 2006-08-31 | 731-293-8XXX | 8000–8999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | JACKSON | TN |
| 2006-08-21 | 731-335-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | UNION CITY | TN |
| 2006-08-21 | 731-438-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SAVANNAH | TN |
| 2006-08-21 | 731-612-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | RIPLEY | TN |
| 2006-08-11 | 731-281-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MARTIN | TN |
| 2006-08-07 | 731-736-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JACKSON | TN |
| 2006-07-28 | 731-472-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIDDLETON | TN |
| 2006-07-25 | 731-345-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | BELLS | TN |
| 2006-07-21 | 731-212-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BOLIVAR | TN |
| 2006-07-21 | 731-439-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SELMER | TN |
| 2006-07-21 | 731-608-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | HENDERSON | TN |
| 2006-07-06 | 731-727-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SAVANNAH | TN |
| 2006-05-25 | 731-707-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BIG SANDY | TN |
| 2006-03-23 | 731-388-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | HUMBOLDT | TN |
| 2006-03-23 | 731-407-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | PARIS | TN |
| 2006-03-23 | 731-599-8XXX | 8000–8999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | UNION CITY | TN |
| 2006-03-21 | 731-256-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | JACKSON | TN |
| 2006-03-16 | 731-334-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | DYERSBURG | TN |
| 2006-03-16 | 731-334-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | DYERSBURG | TN |
| 2006-03-13 | 731-518-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BOLIVAR | TN |
| 2006-03-13 | 731-882-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DYERSBURG | TN |
| 2006-02-27 | 731-249-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | LEXINGTON | 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.