NumberResearchThousands-blocks in 731-474
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 731-474 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-11-09 | 731-474-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GIBSON | TN |
| 2014-10-22 | 731-474-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | GIBSON | TN |
| 2013-10-23 | 731-474-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GIBSON | TN |
| 2016-01-14 | 731-474-3XXX | 3000–3999 | Assigned | PEERLESS NETWORK OF TENNESSEE, LLC - TN | 276F | GIBSON | TN |
| 2004-11-03 | 731-474-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | GIBSON | TN |
| 2016-05-06 | 731-474-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | GIBSON | TN |
| 2022-01-20 | 731-474-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | GIBSON | TN |
| 2014-04-04 | 731-474-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | GIBSON | TN |
| 2021-08-26 | 731-474-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | GIBSON | TN |
| 2008-10-30 | 731-474-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | GIBSON | 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.