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 |
|---|---|---|---|---|---|---|---|
| 2019-09-06 | 731-283-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF TENNESSEE, LLC - TN | 276F | DYER | TN |
| 2019-08-29 | 731-246-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | UNION CITY | TN |
| 2019-07-30 | 731-280-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | SHILOH | TN |
| 2019-07-30 | 731-309-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | MILLEDGEVL | TN |
| 2019-07-30 | 731-315-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | ADAMSVILLE | TN |
| 2019-07-18 | 731-736-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | JACKSON | TN |
| 2019-06-25 | 731-341-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | DRESDEN | TN |
| 2019-06-06 | 731-223-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SO FULTON | TN |
| 2019-05-28 | 731-229-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2019-05-28 | 731-229-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2019-05-28 | 731-229-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2019-05-28 | 731-319-4XXX | 4000–4999 | Assigned | PEERLESS NETWORK OF TENNESSEE, LLC - TN | 276F | TIPTONVL | TN |
| 2019-05-24 | 731-240-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | JACKSON | TN |
| 2019-05-24 | 731-240-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | JACKSON | TN |
| 2019-05-24 | 731-497-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | RIDGELY | TN |
| 2019-05-24 | 731-497-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | RIDGELY | TN |
| 2019-05-24 | 731-628-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | NEWBERN | TN |
| 2019-05-24 | 731-628-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | NEWBERN | TN |
| 2019-05-14 | 731-242-1XXX | 1000–1999 | Assigned | JACKSON ENERGY AUTHORITY - TN | 150G | HUNTINGDON | TN |
| 2019-05-09 | 731-200-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | TRENTON | TN |
| 2019-05-09 | 731-202-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | BELLS | TN |
| 2019-05-09 | 731-237-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | GREENFIELD | TN |
| 2019-05-09 | 731-248-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | GIBSON | TN |
| 2019-05-09 | 731-258-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | KENTON | TN |
| 2019-05-09 | 731-260-4XXX | 4000–4999 | Assigned | TELNYX LLC | 073H | HENNING | TN |
| 2019-05-09 | 731-310-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | TROY | TN |
| 2019-05-09 | 731-312-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | CEDARGROVE | TN |
| 2019-05-09 | 731-319-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | TIPTONVL | TN |
| 2019-05-09 | 731-327-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | MICHIE | TN |
| 2019-05-09 | 731-497-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | RIDGELY | TN |
| 2019-05-09 | 731-603-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | BETHEL SPG | TN |
| 2019-05-09 | 731-628-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | NEWBERN | TN |
| 2019-05-09 | 731-732-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | GRAND JCT | TN |
| 2019-05-09 | 731-837-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | MIDDLETON | TN |
| 2019-05-09 | 731-903-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | HALLS | TN |
| 2019-05-08 | 731-229-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | PARIS | TN |
| 2019-04-24 | 731-200-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | TRENTON | TN |
| 2019-04-04 | 731-206-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SCOTTSHILL | TN |
| 2019-04-04 | 731-229-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2019-03-27 | 731-274-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | SIDONIA | TN |
| 2019-03-27 | 731-274-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | SIDONIA | TN |
| 2019-03-27 | 731-275-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | PALMERSVL | TN |
| 2019-03-27 | 731-275-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | PALMERSVL | TN |
| 2019-03-27 | 731-319-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | TIPTONVL | TN |
| 2019-03-27 | 731-319-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | TIPTONVL | TN |
| 2019-03-27 | 731-703-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | SHARON | TN |
| 2019-03-27 | 731-703-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | SHARON | TN |
| 2019-03-26 | 731-271-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | SO FULTON | TN |
| 2019-03-26 | 731-271-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | SO FULTON | TN |
| 2019-03-14 | 731-497-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | RIDGELY | 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.