NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 951-566

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 951-566 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 951 blocks

Most active assignees, all time — NPA 951
LEVEL 3 COMMUNICATIONS, LLC - CA 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 1
PEERLESS NETWORK OF CALIFORNIA, LLC - CA 1
ONVOY, LLC - CA 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
— 951-566-0XXX 0000–0999Reserved LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SUN CITY CA
— 951-566-1XXX 1000–1999Reserved BANDWIDTH.COM CLEC, LLC - CA 981E SUN CITY CA
2019-02-06 951-566-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SUN CITY CA
2013-03-18 951-566-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SUN CITY CA
2005-07-26 951-566-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SUN CITY CA
2004-10-26 951-566-5XXX 5000–5999Assigned FRONTIER CALIFORNIA INC. 2319 SUN CITY CA
2004-04-15 951-566-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2004-04-15 951-566-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2024-10-14 951-566-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUN CITY CA
2002-11-14 951-566-9XXX 9000–9999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SUN CITY CA

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.