NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 574-263

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 574-263 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
ONVOY, LLC - IN 4
LEVEL 3 COMMUNICATIONS, LLC - IN 2
TERRA NOVA TELECOM INC. 1
TELNYX LLC 1
MCC TELEPHONY OF THE MID-WEST, LLC - IN 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
— 574-263-0XXX 0000–0999Reserved LEVEL 3 COMMUNICATIONS, LLC - IN 4803 TIPPECANOE IN
2010-06-11 574-263-1XXX 1000–1999Assigned MCC TELEPHONY OF THE MID-WEST, LLC - IN 874F TIPPECANOE IN
2018-09-18 574-263-2XXX 2000–2999Assigned ONVOY, LLC - IN 097D TIPPECANOE IN
2020-10-12 574-263-3XXX 3000–3999Assigned ONVOY, LLC - IN 097D TIPPECANOE IN
2022-06-06 574-263-4XXX 4000–4999Assigned TERRA NOVA TELECOM INC. 145J TIPPECANOE IN
2020-10-12 574-263-5XXX 5000–5999Assigned ONVOY, LLC - IN 097D TIPPECANOE IN
2021-02-24 574-263-6XXX 6000–6999Assigned ONVOY, LLC - IN 097D TIPPECANOE IN
— 574-263-7XXX 7000–7999Assigned (pending) TIPPECANOE IN
2020-06-18 574-263-8XXX 8000–8999Assigned TELNYX LLC 073H TIPPECANOE IN
— 574-263-9XXX 9000–9999Reserved LEVEL 3 COMMUNICATIONS, LLC - IN 4803 TIPPECANOE 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.