NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 925-660

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 925-660 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 925 blocks

Most active assignees, all time — NPA 925
T-MOBILE USA, INC. 3
ONVOY, LLC - CA 3
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 3
PEERLESS NETWORK OF CALIFORNIA, 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
2017-05-19 925-660-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C PLEASANTON CA
— 925-660-1XXX 1000–1999Reserved LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2018-10-17 925-660-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PLEASANTON CA
— 925-660-3XXX 3000–3999Reserved LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2013-03-27 925-660-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2017-07-17 925-660-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PLEASANTON CA
2019-12-18 925-660-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PLEASANTON CA
2014-10-14 925-660-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C PLEASANTON CA
2023-02-07 925-660-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C PLEASANTON CA
2015-04-20 925-660-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PLEASANTON 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.