NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 360-523

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 360-523 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 360 blocks

Most active assignees, all time — NPA 360
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 4
ONVOY, LLC - WA 2
TELEPORT COMMUNICATIONS AMERICA, LLC - WA 1
PEERLESS NETWORK OF WASHINGTON, LLC - WA 1
METROPCS, INC. 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
2015-11-11 360-523-0XXX 0000–0999Assigned METROPCS, INC. 5562 CENTRALIA WA
— 360-523-1XXX 1000–1999Reserved ONVOY, LLC - WA 483E CENTRALIA WA
2010-06-25 360-523-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F CENTRALIA WA
2011-09-01 360-523-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 CENTRALIA WA
2012-10-09 360-523-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 CENTRALIA WA
2016-03-15 360-523-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 CENTRALIA WA
2012-10-10 360-523-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 CENTRALIA WA
2013-06-04 360-523-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E CENTRALIA WA
2014-02-14 360-523-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 CENTRALIA WA
2015-11-19 360-523-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F CENTRALIA 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.