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 |
|---|---|---|---|---|---|---|---|
| 2016-10-05 | 731-982-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SELMER | TN |
| 2016-09-26 | 731-630-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BROWNSVL | TN |
| 2016-09-26 | 731-630-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BROWNSVL | TN |
| 2016-09-19 | 731-924-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | PARIS | TN |
| 2016-09-13 | 731-741-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BROWNSVL | TN |
| 2016-09-06 | 731-316-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | LEXINGTON | TN |
| 2016-08-11 | 731-332-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MARTIN | TN |
| 2016-08-11 | 731-574-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | JACKSON | TN |
| 2016-07-26 | 731-312-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | CEDARGROVE | TN |
| 2016-07-25 | 731-467-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | JACKSON | TN |
| 2016-07-22 | 731-333-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2016-06-30 | 731-603-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BETHEL SPG | TN |
| 2016-06-28 | 731-361-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BOLIVAR | TN |
| 2016-06-17 | 731-793-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | HUNTINGDON | TN |
| 2016-05-31 | 731-315-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | ADAMSVILLE | TN |
| 2016-05-26 | 731-734-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BROWNSVL | TN |
| 2016-05-24 | 731-254-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | WHITEVILLE | TN |
| 2016-05-24 | 731-254-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | WHITEVILLE | TN |
| 2016-05-24 | 731-310-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | TROY | TN |
| 2016-05-24 | 731-310-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | TROY | TN |
| 2016-05-24 | 731-319-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | TIPTONVL | TN |
| 2016-05-24 | 731-319-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | TIPTONVL | TN |
| 2016-05-24 | 731-324-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | RIPLEY | TN |
| 2016-05-24 | 731-324-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | RIPLEY | TN |
| 2016-05-24 | 731-330-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | TRENTON | TN |
| 2016-05-24 | 731-330-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | TRENTON | TN |
| 2016-05-24 | 731-504-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | UNION CITY | TN |
| 2016-05-24 | 731-504-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | UNION CITY | TN |
| 2016-05-24 | 731-504-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | UNION CITY | TN |
| 2016-05-24 | 731-727-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | SAVANNAH | TN |
| 2016-05-24 | 731-924-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | PARIS | TN |
| 2016-05-24 | 731-924-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | PARIS | TN |
| 2016-05-24 | 731-982-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | SELMER | TN |
| 2016-05-24 | 731-982-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | SELMER | TN |
| 2016-05-23 | 731-207-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | MCKENZIE | TN |
| 2016-05-23 | 731-207-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | MCKENZIE | TN |
| 2016-05-23 | 731-318-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | MILAN | TN |
| 2016-05-23 | 731-318-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | MILAN | TN |
| 2016-05-23 | 731-462-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | MEDINA | TN |
| 2016-05-23 | 731-462-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | MEDINA | TN |
| 2016-05-23 | 731-837-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | MIDDLETON | TN |
| 2016-05-23 | 731-837-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | MIDDLETON | TN |
| 2016-05-20 | 731-258-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | KENTON | TN |
| 2016-05-20 | 731-258-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | KENTON | TN |
| 2016-05-20 | 731-258-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | KENTON | TN |
| 2016-05-20 | 731-316-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | LEXINGTON | TN |
| 2016-05-20 | 731-316-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | LEXINGTON | TN |
| 2016-05-20 | 731-792-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | HUNTINGDON | TN |
| 2016-05-20 | 731-792-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | HUNTINGDON | TN |
| 2016-05-20 | 731-793-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | HUNTINGDON | 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.