NumberResearchThousands-blocks in 304-814
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 304-814 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 304-814-0XXX | 0000–0999 | Available | BUFFALO | WV | ||
| 2013-02-26 | 304-814-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | BUFFALO | WV |
| 2020-04-02 | 304-814-2XXX | 2000–2999 | Assigned | ONVOY, LLC - WV | 449F | BUFFALO | WV |
| 2020-04-02 | 304-814-3XXX | 3000–3999 | Assigned | ONVOY, LLC - WV | 449F | BUFFALO | WV |
| 2018-09-27 | 304-814-4XXX | 4000–4999 | Assigned | ONVOY, LLC - WV | 449F | BUFFALO | WV |
| 2020-11-20 | 304-814-5XXX | 5000–5999 | Assigned | ONVOY, LLC - WV | 449F | BUFFALO | WV |
| 2021-05-05 | 304-814-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BUFFALO | WV |
| 2015-08-28 | 304-814-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BUFFALO | WV |
| 2020-11-20 | 304-814-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WV | 449F | BUFFALO | WV |
| 2008-10-24 | 304-814-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - WV | 080F | BUFFALO | 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.