NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 509-592

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 509-592 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 509 blocks

Most active assignees, all time — NPA 509
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5
T-MOBILE USA, INC. 1
SKYE TELECOM LLC DBA SKYETEL 1
ONVOY, LLC - WA 1
NEW CINGULAR WIRELESS PCS, LLC 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
2005-02-04 509-592-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PULLMAN WA
2014-11-19 509-592-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PULLMAN WA
2021-10-05 509-592-2XXX 2000–2999Assigned SKYE TELECOM LLC DBA SKYETEL 622J PULLMAN WA
2006-12-05 509-592-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PULLMAN WA
2002-05-08 509-592-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PULLMAN WA
2007-10-17 509-592-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PULLMAN WA
2008-09-18 509-592-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PULLMAN WA
2006-02-09 509-592-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PULLMAN WA
2006-09-14 509-592-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PULLMAN WA
2011-03-29 509-592-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E PULLMAN 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.