NumberResearchThousands-blocks in 731-737
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 731-737 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 731 blocks
Most active assignees, all time — NPA 731
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-07-13 | 731-737-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | DYERSBURG | TN |
| 2022-04-21 | 731-737-1XXX | 1000–1999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | DYERSBURG | TN |
| 2022-08-24 | 731-737-2XXX | 2000–2999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | DYERSBURG | TN |
| 2022-03-04 | 731-737-3XXX | 3000–3999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | DYERSBURG | TN |
| 2023-07-13 | 731-737-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | DYERSBURG | TN |
| 2023-09-05 | 731-737-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | DYERSBURG | TN |
| 2023-07-13 | 731-737-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | DYERSBURG | TN |
| 2025-09-17 | 731-737-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | DYERSBURG | TN |
| 2023-05-09 | 731-737-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DYERSBURG | TN |
| 2023-07-13 | 731-737-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | DYERSBURG | 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.