NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 425-789

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 425-789 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
TELEPORT COMMUNICATIONS AMERICA, LLC - WA 4
NEW CINGULAR WIRELESS PCS, LLC 3
T-MOBILE USA, INC. 2
COMCAST IP PHONE, 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
— 425-789-0XXX 0000–0999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
2008-12-30 425-789-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
— 425-789-2XXX 2000–2999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
— 425-789-3XXX 3000–3999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
2012-07-05 425-789-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
— 425-789-5XXX 5000–5999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
2011-10-12 425-789-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2011-10-12 425-789-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2011-10-12 425-789-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2012-07-05 425-789-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EVERETT WA

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.