NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 425-585

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 425-585 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 425 blocks

Most active assignees, all time — NPA 425
HD CARRIER LLC 3
ONVOY, LLC - WA 2
WIDE VOICE, LLC - WA 1
TELEPORT COMMUNICATIONS AMERICA, LLC - WA 1
NEW CINGULAR WIRELESS PCS, 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
— 425-585-0XXX 0000–0999Reserved COMCAST IP PHONE, LLC 318J SILVERLAKE WA
2016-10-07 425-585-1XXX 1000–1999Assigned WIDE VOICE, LLC - WA 707G SILVERLAKE WA
2021-05-28 425-585-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2019-12-18 425-585-3XXX 3000–3999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2021-05-28 425-585-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2016-04-27 425-585-5XXX 5000–5999Assigned HD CARRIER LLC 321J SILVERLAKE WA
2019-04-11 425-585-6XXX 6000–6999Assigned HD CARRIER LLC 321J SILVERLAKE WA
2019-07-29 425-585-7XXX 7000–7999Assigned HD CARRIER LLC 321J SILVERLAKE WA
2017-03-22 425-585-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SILVERLAKE WA
— 425-585-9XXX 9000–9999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 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.