Thousands-blocks in 575-689

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 575-689 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

BANDWIDTH.COM CLEC, LLC - NM 3

ONVOY, LLC - NM 2

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 2

TELEPORT COMMUNICATIONS AMERICA NM-LLC 1

T-MOBILE USA, INC. 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
2011-08-18	575-689-0XXX	0000–0999	Assigned	T-MOBILE USA, INC.	6529	CARLSBAD	NM
2015-07-17	575-689-1XXX	1000–1999	Assigned	BANDWIDTH.COM CLEC, LLC - NM	123F	CARLSBAD	NM
2017-08-15	575-689-2XXX	2000–2999	Assigned	ONVOY, LLC - NM	206F	CARLSBAD	NM
2015-03-03	575-689-3XXX	3000–3999	Assigned	TELEPORT COMMUNICATIONS AMERICA NM-LLC	450C	CARLSBAD	NM
2016-05-16	575-689-4XXX	4000–4999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	CARLSBAD	NM
2013-04-25	575-689-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM	6573	CARLSBAD	NM
2015-02-05	575-689-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - NM	123F	CARLSBAD	NM
2013-06-04	575-689-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM	6573	CARLSBAD	NM
2012-05-29	575-689-8XXX	8000–8999	Assigned	BANDWIDTH.COM CLEC, LLC - NM	123F	CARLSBAD	NM
2023-08-16	575-689-9XXX	9000–9999	Assigned	ONVOY, LLC - NM	206F	CARLSBAD	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.