NumberResearchThousands-blocks in 304-585
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 304-585 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
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-07-26 | 304-585-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | KIMBALL | WV |
| 2012-07-26 | 304-585-1XXX | 1000–1999 | Assigned | SHENTEL COMMUNICATIONS, LLC. - WV | 489F | KIMBALL | WV |
| 2021-02-09 | 304-585-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | KIMBALL | WV |
| 2024-03-07 | 304-585-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | KIMBALL | WV |
| 2024-10-22 | 304-585-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | KIMBALL | WV |
| 2025-08-06 | 304-585-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | KIMBALL | WV |
| — | 304-585-6XXX | 6000–6999 | Available | KIMBALL | WV | ||
| — | 304-585-7XXX | 7000–7999 | Reserved | CITIZENS TEL CO OF WV DBA FRONTIER OF WV | 0270 | KIMBALL | WV |
| 2021-02-03 | 304-585-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WV | 449F | KIMBALL | WV |
| — | 304-585-9XXX | 9000–9999 | Reserved | CITIZENS TEL CO OF WV DBA FRONTIER OF WV | 0270 | KIMBALL | 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.