NumberResearchThousands-blocks in 304-731
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 304-731 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 304 blocks
Most active assignees, all time — NPA 304
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-11-07 | 304-731-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BECKLEY | WV |
| 2010-12-13 | 304-731-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | BECKLEY | WV |
| 2006-10-05 | 304-731-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | BECKLEY | WV |
| 2006-09-01 | 304-731-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | BECKLEY | WV |
| 2003-12-01 | 304-731-4XXX | 4000–4999 | Assigned | CITYNET WEST VIRGINIA, LLC - WV | 545B | BECKLEY | WV |
| 2006-05-30 | 304-731-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BECKLEY | WV |
| 2015-01-08 | 304-731-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BECKLEY | WV |
| — | 304-731-7XXX | 7000–7999 | Reserved | T-MOBILE USA, INC. | 6529 | BECKLEY | WV |
| 2006-05-16 | 304-731-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | BECKLEY | WV |
| 2006-03-09 | 304-731-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | BECKLEY | WV |
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.