NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 574-265

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 574-265 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 574 blocks

Most active assignees, all time — NPA 574
T-MOBILE USA, INC. 8
FBN INDIANA, INC. - IN 1
COMMUNICATIONS VENTURE CORP DBA INDIGITAL TELECOM 1
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2004-02-26 574-265-0XXX 0000–0999Assigned FBN INDIANA, INC. - IN 4117 WARSAW IN
— 574-265-1XXX 1000–1999Reserved T-MOBILE USA, INC. 6529 WARSAW IN
2005-05-26 574-265-2XXX 2000–2999Assigned COMMUNICATIONS VENTURE CORP DBA INDIGITAL TELECOM 4169 WARSAW IN
— 574-265-3XXX 3000–3999Reserved T-MOBILE USA, INC. 6529 WARSAW IN
— 574-265-4XXX 4000–4999Reserved T-MOBILE USA, INC. 6529 WARSAW IN
— 574-265-5XXX 5000–5999Reserved T-MOBILE USA, INC. 6529 WARSAW IN
— 574-265-6XXX 6000–6999Reserved T-MOBILE USA, INC. 6529 WARSAW IN
2006-03-28 574-265-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WARSAW IN
2004-12-28 574-265-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WARSAW IN
— 574-265-9XXX 9000–9999Reserved T-MOBILE USA, INC. 6529 WARSAW IN

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.