NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 253-327

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 253-327 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
T-MOBILE USA, INC. 4
ONVOY, LLC - WA 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 2
RAINIER CONNECT, INC. - WA 1
ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 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
2008-03-03 253-327-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2008-03-17 253-327-1XXX 1000–1999Assigned RAINIER CONNECT, INC. - WA 7720 TACOMA WA
2008-08-27 253-327-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 TACOMA WA
2008-09-18 253-327-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-09-18 253-327-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-09-08 253-327-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2009-05-07 253-327-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E TACOMA WA
2022-09-22 253-327-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E TACOMA WA
2008-02-15 253-327-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2008-02-15 253-327-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA 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.