NumberResearchThousands-blocks in 731-207
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 731-207 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-01-23 | 731-207-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | MCKENZIE | TN |
| 2014-10-09 | 731-207-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MCKENZIE | 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 |
| 2018-02-14 | 731-207-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | MCKENZIE | TN |
| 2018-08-30 | 731-207-5XXX | 5000–5999 | Assigned | JACKSON ENERGY AUTHORITY - TN | 150G | MCKENZIE | TN |
| 2018-12-13 | 731-207-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | MCKENZIE | TN |
| 2016-02-29 | 731-207-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | MCKENZIE | TN |
| 2016-02-29 | 731-207-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | MCKENZIE | TN |
| 2018-12-13 | 731-207-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | MCKENZIE | 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.