NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 419-855

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

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

The ten 1,000-number thousand-blocks inside prefix 419-855 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 419 blocks

Most active assignees, all time — NPA 419
FRONTIER NORTH, INC. - OH 7
TWC IP ENABLED SERVICES, LLC 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 1
BANDWIDTH.COM CLEC, LLC - OH 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
— 419-855-0XXX 0000–0999Reserved FRONTIER NORTH, INC. - OH 0615 GENOA OH
— 419-855-1XXX 1000–1999Reserved FRONTIER NORTH, INC. - OH 0615 GENOA OH
2008-12-03 419-855-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F GENOA OH
— 419-855-3XXX 3000–3999Reserved FRONTIER NORTH, INC. - OH 0615 GENOA OH
— 419-855-4XXX 4000–4999Reserved FRONTIER NORTH, INC. - OH 0615 GENOA OH
2004-09-03 419-855-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7158 GENOA OH
2006-10-05 419-855-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K GENOA OH
— 419-855-7XXX 7000–7999Reserved FRONTIER NORTH, INC. - OH 0615 GENOA OH
— 419-855-8XXX 8000–8999Reserved FRONTIER NORTH, INC. - OH 0615 GENOA OH
— 419-855-9XXX 9000–9999Reserved FRONTIER NORTH, INC. - OH 0615 GENOA OH

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.