NumberResearchThousands-blocks in 731-326
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 731-326 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 731-326-0XXX | 0000–0999 | Reserved | POWERTEL MEMPHIS LICENSES, INC. | 7474 | BROWNSVL | TN |
| 2008-01-31 | 731-326-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | BROWNSVL | TN |
| 2010-01-05 | 731-326-2XXX | 2000–2999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | BROWNSVL | TN |
| 2014-07-22 | 731-326-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BROWNSVL | TN |
| 2021-09-03 | 731-326-4XXX | 4000–4999 | Assigned | POWERTEL MEMPHIS LICENSES, INC. | 7474 | BROWNSVL | TN |
| 2011-04-29 | 731-326-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BROWNSVL | TN |
| — | 731-326-6XXX | 6000–6999 | Reserved | POWERTEL MEMPHIS LICENSES, INC. | 7474 | BROWNSVL | TN |
| — | 731-326-7XXX | 7000–7999 | Reserved | POWERTEL MEMPHIS LICENSES, INC. | 7474 | BROWNSVL | TN |
| 2015-01-21 | 731-326-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BROWNSVL | TN |
| — | 731-326-9XXX | 9000–9999 | Reserved | POWERTEL MEMPHIS LICENSES, INC. | 7474 | BROWNSVL | 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.