NumberResearchThousands-blocks in 304-512
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 304-512 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, last 30 days — NPA 304
New assignments by month
Sep 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2008-10-27 | 304-512-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - WV | 080F | RAVENSWOOD | WV |
| 2021-06-28 | 304-512-1XXX | 1000–1999 | Assigned | ONVOY, LLC - WV | 449F | RAVENSWOOD | WV |
| 2021-05-06 | 304-512-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | RAVENSWOOD | WV |
| 2019-06-26 | 304-512-3XXX | 3000–3999 | Assigned | ONVOY, LLC - WV | 449F | RAVENSWOOD | WV |
| 2013-01-09 | 304-512-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | RAVENSWOOD | WV |
| 2014-01-23 | 304-512-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | RAVENSWOOD | WV |
| 2019-04-11 | 304-512-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - WV | 077G | RAVENSWOOD | WV |
| 2004-03-08 | 304-512-7XXX | 7000–7999 | Assigned | CITYNET WEST VIRGINIA, LLC - WV | 545B | RAVENSWOOD | WV |
| 2026-09-15 | 304-512-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | RAVENSWOOD | WV |
| — | 304-512-9XXX | 9000–9999 | Reserved | T-MOBILE USA, INC. | 6529 | RAVENSWOOD | 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.