NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 419-570

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 419-570 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
QUALSTAR COMMUNICATIONS, INC. - OH 4
PEERLESS NETWORK OF OHIO, LLC - OH 2
TWC IP ENABLED SERVICES, LLC 1
LEVEL 3 COMMUNICATIONS, LLC - OH 1
CENTURYLINK COMMUNICATIONS, LLC 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
— 419-570-0XXX 0000–0999Reserved QUALSTAR COMMUNICATIONS, INC. - OH 2094 RCFLDCTBRY OH
— 419-570-1XXX 1000–1999Reserved QUALSTAR COMMUNICATIONS, INC. - OH 2094 RCFLDCTBRY OH
— 419-570-2XXX 2000–2999Reserved QUALSTAR COMMUNICATIONS, INC. - OH 2094 RCFLDCTBRY OH
— 419-570-3XXX 3000–3999Reserved QUALSTAR COMMUNICATIONS, INC. - OH 2094 RCFLDCTBRY OH
2014-03-18 419-570-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RCFLDCTBRY OH
2013-12-09 419-570-5XXX 5000–5999Assigned PEERLESS NETWORK OF OHIO, LLC - OH 284F RCFLDCTBRY OH
2005-03-31 419-570-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 RCFLDCTBRY OH
2008-10-17 419-570-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K RCFLDCTBRY OH
2026-05-22 419-570-8XXX 8000–8999Assigned PEERLESS NETWORK OF OHIO, LLC - OH 284F RCFLDCTBRY OH
2008-12-04 419-570-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F RCFLDCTBRY 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.