Thousands-blocks in 505-371

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 505-371 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 505 blocks

Most active assignees, all time — NPA 505

NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM 7

TERRA NOVA TELECOM INC. 1

TELNYX 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
—	505-371-0XXX	0000–0999	Reserved	NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM	4450	TSE BONITO	NM
—	505-371-1XXX	1000–1999	Reserved	NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM	4450	TSE BONITO	NM
2019-11-18	505-371-2XXX	2000–2999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - NM	5470	TSE BONITO	NM
—	505-371-3XXX	3000–3999	Reserved	NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM	4450	TSE BONITO	NM
2022-07-19	505-371-4XXX	4000–4999	Assigned	TELNYX LLC	073H	TSE BONITO	NM
—	505-371-5XXX	5000–5999	Reserved	NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM	4450	TSE BONITO	NM
—	505-371-6XXX	6000–6999	Reserved	NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM	4450	TSE BONITO	NM
2025-06-16	505-371-7XXX	7000–7999	Assigned	TERRA NOVA TELECOM INC.	145J	TSE BONITO	NM
—	505-371-8XXX	8000–8999	Reserved	NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM	4450	TSE BONITO	NM
—	505-371-9XXX	9000–9999	Reserved	NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM	4450	TSE BONITO	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.