NumberResearchThousands-blocks in 731-472
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 731-472 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 |
|---|---|---|---|---|---|---|---|
| 2008-10-30 | 731-472-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | MIDDLETON | TN |
| 2014-03-12 | 731-472-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | MIDDLETON | TN |
| 2006-07-28 | 731-472-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | MIDDLETON | TN |
| 2005-04-20 | 731-472-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MIDDLETON | TN |
| 2004-11-03 | 731-472-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MIDDLETON | TN |
| 2024-12-23 | 731-472-5XXX | 5000–5999 | Assigned | PEERLESS NETWORK OF TENNESSEE, LLC - TN | 276F | MIDDLETON | TN |
| 2024-02-12 | 731-472-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF TENNESSEE, LLC - TN | 276F | MIDDLETON | TN |
| 2016-02-29 | 731-472-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | MIDDLETON | TN |
| 2016-02-29 | 731-472-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | MIDDLETON | TN |
| 2016-01-14 | 731-472-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF TENNESSEE, LLC - TN | 276F | MIDDLETON | 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.