NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 626-321

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 626-321 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 626 blocks

Most active assignees, all time — NPA 626
T-MOBILE USA, INC. 5
NEW CINGULAR WIRELESS PCS, LLC 3
TELEPORT COMMUNICATIONS AMERICA, LLC - CA 1
PEERLESS NETWORK OF CALIFORNIA, LLC - CA 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
2008-10-24 626-321-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARCADIA CA
2005-09-06 626-321-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ARCADIA CA
2003-10-15 626-321-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARCADIA CA
2004-11-11 626-321-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ARCADIA CA
— 626-321-4XXX 4000–4999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 ARCADIA CA
2004-12-13 626-321-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARCADIA CA
2003-10-15 626-321-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARCADIA CA
2003-10-15 626-321-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARCADIA CA
2005-09-06 626-321-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARCADIA CA
2014-05-12 626-321-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ARCADIA CA

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.