NumberResearchRecent thousands-block assignments
0 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, all time — NPA 731
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2023-07-31 | 731-961-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | BELLS | TN |
| 2023-01-27 | 731-291-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | BELLS | TN |
| 2021-02-09 | 731-202-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | BELLS | TN |
| 2020-12-30 | 731-255-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | MARTIN | TN |
| 2020-12-30 | 731-274-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | SIDONIA | TN |
| 2020-12-30 | 731-275-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | PALMERSVL | TN |
| 2020-12-30 | 731-276-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | LATHAM | TN |
| 2020-12-30 | 731-341-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | DRESDEN | TN |
| 2020-12-30 | 731-703-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | SHARON | TN |
| 2020-12-30 | 731-944-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | SO FULTON | TN |
| 2020-12-04 | 731-289-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | MEDINA | TN |
| 2020-12-04 | 731-859-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | WHITEVILLE | TN |
| 2020-12-04 | 731-877-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | GLEASON | TN |
| 2020-02-19 | 731-284-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | HORNBEAK | TN |
| 2019-11-22 | 731-330-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | TRENTON | TN |
| 2019-11-11 | 731-283-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | DYER | TN |
| 2019-11-08 | 731-600-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | MCKENZIE | 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 |
| 2018-09-11 | 731-318-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | MILAN | TN |
| 2018-09-11 | 731-666-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | CAMDEN | TN |
| 2018-09-11 | 731-879-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | HENDERSON | TN |
| 2017-03-22 | 731-229-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | PARIS | TN |
| 2017-03-22 | 731-244-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | SELMER | TN |
| 2017-03-17 | 731-316-7XXX | 7000–7999 | Assigned | TELNYX LLC | 073H | LEXINGTON | TN |
| 2017-03-17 | 731-324-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | RIPLEY | TN |
| 2017-03-17 | 731-361-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | BOLIVAR | TN |
| 2017-03-17 | 731-458-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | SAVANNAH | TN |
| 2017-03-17 | 731-507-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | UNION CITY | TN |
| 2017-03-17 | 731-519-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | BROWNSVL | TN |
| 2017-03-17 | 731-747-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | HUMBOLDT | TN |
| 2017-03-17 | 731-777-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | DYERSBURG | TN |
| 2017-03-17 | 731-792-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | HUNTINGDON | TN |
| 2017-03-17 | 731-891-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | JACKSON | TN |
| 2017-03-01 | 731-888-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | BIG SANDY | 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.