Thousands-blocks in 570-667

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 570-667 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 570 blocks

Most active assignees, all time — NPA 570

CORE COMMUNICATIONS, INC. - PA 5

ONVOY, LLC - PA 2

LEVEL 3 COMMUNICATIONS, LLC - PA 1

IDT AMERICA, CORP. - PA 1

CENTURYLINK COMMUNICATIONS, LLC 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
2009-03-23	570-667-0XXX	0000–0999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	MUHLENBURG	PA
2010-01-15	570-667-1XXX	1000–1999	Assigned	IDT AMERICA, CORP. - PA	213C	MUHLENBURG	PA
2015-05-27	570-667-2XXX	2000–2999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - PA	4007	MUHLENBURG	PA
2018-05-18	570-667-3XXX	3000–3999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	MUHLENBURG	PA
2018-05-18	570-667-4XXX	4000–4999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	MUHLENBURG	PA
2018-05-18	570-667-5XXX	5000–5999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	MUHLENBURG	PA
2019-10-11	570-667-6XXX	6000–6999	Assigned	ONVOY, LLC - PA	547E	MUHLENBURG	PA
2019-03-11	570-667-7XXX	7000–7999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	MUHLENBURG	PA
2016-01-05	570-667-8XXX	8000–8999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	MUHLENBURG	PA
2021-03-08	570-667-9XXX	9000–9999	Assigned	ONVOY, LLC - PA	547E	MUHLENBURG	PA

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.