Thousands-blocks in 575-680

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 575-680 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

T-MOBILE USA, INC. 5

LEVEL 3 COMMUNICATIONS, LLC - NM 2

MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM 1

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 1

AT&T - LOCAL 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
2007-01-22	575-680-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM	6573	LAS CRUCES	NM
2006-10-10	575-680-1XXX	1000–1999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - NM	5470	LAS CRUCES	NM
2006-10-10	575-680-2XXX	2000–2999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - NM	5470	LAS CRUCES	NM
2006-10-31	575-680-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM	7464	LAS CRUCES	NM
2007-04-23	575-680-4XXX	4000–4999	Assigned	T-MOBILE USA, INC.	6529	LAS CRUCES	NM
2006-02-15	575-680-5XXX	5000–5999	Assigned	T-MOBILE USA, INC.	6529	LAS CRUCES	NM
2005-02-03	575-680-6XXX	6000–6999	Assigned	T-MOBILE USA, INC.	6529	LAS CRUCES	NM
2005-02-21	575-680-7XXX	7000–7999	Assigned	T-MOBILE USA, INC.	6529	LAS CRUCES	NM
2005-02-21	575-680-8XXX	8000–8999	Assigned	T-MOBILE USA, INC.	6529	LAS CRUCES	NM
2002-06-20	575-680-9XXX	9000–9999	Assigned	AT&T - LOCAL	7421	LAS CRUCES	NM

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.