NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 530-615

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 530-615 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 530 blocks

Most active assignees, all time — NPA 530
NEW CINGULAR WIRELESS PCS, LLC 3
TELEPORT COMMUNICATIONS AMERICA, LLC - CA 1
T-MOBILE USA, INC. 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
2008-09-05 530-615-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GRVY MAIN CA
2010-02-05 530-615-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 GRVY MAIN CA
2008-01-16 530-615-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 GRVY MAIN CA
2010-06-21 530-615-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C GRVY MAIN CA
2010-04-23 530-615-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L GRVY MAIN CA
2013-03-04 530-615-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F GRVY MAIN CA
2009-09-25 530-615-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GRVY MAIN CA
2008-06-25 530-615-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GRVY MAIN CA
2008-01-23 530-615-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GRVY MAIN CA
2008-01-02 530-615-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 GRVY MAIN CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.