NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 253-766

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 253-766 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 253 blocks

Most active assignees, all time — NPA 253
ONVOY, LLC - WA 3
NEW CINGULAR WIRELESS PCS, LLC 2
METROPCS, INC. 2
TON80 COMMUNICATIONS, LLC 1
TELEPORT COMMUNICATIONS AMERICA, 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
2022-02-02 253-766-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2015-03-06 253-766-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2021-06-07 253-766-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J KENT WA
2017-10-19 253-766-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E KENT WA
2017-10-19 253-766-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E KENT WA
2020-10-20 253-766-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E KENT WA
— 253-766-6XXX 6000–6999Reserved MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KENT WA
2014-11-26 253-766-7XXX 7000–7999Assigned METROPCS, INC. 5562 KENT WA
— 253-766-8XXX 8000–8999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KENT WA
2014-09-02 253-766-9XXX 9000–9999Assigned METROPCS, INC. 5562 KENT 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.