Thousands-blocks in 575-735

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 575-735 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 575 blocks

Most active assignees, all time — NPA 575

ONVOY, LLC - NM 4

TELNYX LLC 1

PEERLESS NETWORK OF NEW MEXICO, LLC - NM 1

ONVOY SPECTRUM, LLC 1

LEVEL 3 COMMUNICATIONS, LLC - NM 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

Recent thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
2016-03-23	575-735-0XXX	0000–0999	Assigned	ONVOY, LLC - NM	206F	CIMARRON	NM
2016-03-23	575-735-1XXX	1000–1999	Assigned	ONVOY, LLC - NM	206F	CIMARRON	NM
2021-06-19	575-735-2XXX	2000–2999	Assigned	PEERLESS NETWORK OF NEW MEXICO, LLC - NM	377H	CIMARRON	NM
2023-01-25	575-735-3XXX	3000–3999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - NM	5470	CIMARRON	NM
2024-12-27	575-735-4XXX	4000–4999	Assigned	ONVOY SPECTRUM, LLC	624H	CIMARRON	NM
2020-11-20	575-735-5XXX	5000–5999	Assigned	ONVOY, LLC - NM	206F	CIMARRON	NM
2020-11-20	575-735-6XXX	6000–6999	Assigned	ONVOY, LLC - NM	206F	CIMARRON	NM
—	575-735-7XXX	7000–7999	Available			CIMARRON	NM
2022-05-02	575-735-8XXX	8000–8999	Assigned	IP HORIZON LLC	515J	CIMARRON	NM
2018-08-22	575-735-9XXX	9000–9999	Assigned	TELNYX LLC	073H	CIMARRON	NM

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.