NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 304-373

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

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 304-373 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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 4
NEW CINGULAR WIRELESS PCS, LLC - DC 3
FRONTIER WEST VIRGINIA INC. 2
FIBERNET, LLC - WV 1
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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
— 304-373-0XXX 0000–0999Reserved FRONTIER WEST VIRGINIA INC. 9214 RIPLEY WV
2003-08-12 304-373-1XXX 1000–1999Assigned FIBERNET, LLC - WV 4095 RIPLEY WV
— 304-373-2XXX 2000–2999Reserved FRONTIER WEST VIRGINIA INC. 9214 RIPLEY WV
2005-03-18 304-373-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 RIPLEY WV
2006-04-04 304-373-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 RIPLEY WV
2006-04-13 304-373-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 RIPLEY WV
2008-08-05 304-373-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 RIPLEY WV
2007-05-03 304-373-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RIPLEY WV
2008-10-24 304-373-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RIPLEY WV
2008-10-24 304-373-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RIPLEY WV

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.