NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 425-225

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 425-225 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 425 blocks

Most active assignees, all time — NPA 425
ONVOY, LLC - WA 3
HD CARRIER LLC 2
COMCAST IP PHONE, LLC 2
ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 1
LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 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
2016-08-18 425-225-0XXX 0000–0999Assigned HD CARRIER LLC 321J SILVERLAKE WA
— 425-225-1XXX 1000–1999Reserved LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 SILVERLAKE WA
2005-12-28 425-225-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SILVERLAKE WA
2020-06-17 425-225-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2020-06-17 425-225-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2006-05-04 425-225-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SILVERLAKE WA
2010-12-23 425-225-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SILVERLAKE WA
2013-02-26 425-225-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2004-09-15 425-225-8XXX 8000–8999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 SILVERLAKE WA
2016-08-18 425-225-9XXX 9000–9999Assigned HD CARRIER LLC 321J SILVERLAKE WA

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.