NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 253-480

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 253-480 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
METROPCS, INC. 2
ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 2
COMCAST IP PHONE, LLC 2
BANDWIDTH.COM CLEC, LLC - WA 2
ONVOY, 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
2020-10-21 253-480-0XXX 0000–0999Assigned METROPCS, INC. 5562 KENT WA
2020-10-21 253-480-1XXX 1000–1999Assigned METROPCS, INC. 5562 KENT WA
2011-03-24 253-480-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KENT WA
— 253-480-3XXX 3000–3999Reserved ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KENT WA
2016-03-08 253-480-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KENT WA
2016-03-08 253-480-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KENT WA
2016-02-22 253-480-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E KENT WA
2020-10-06 253-480-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2016-04-27 253-480-8XXX 8000–8999Assigned HD CARRIER LLC 321J KENT WA
2020-10-06 253-480-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J 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.