Thousands-blocks in 978-586

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 978-586 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 978 blocks

Most active assignees, all time — NPA 978

PAETEC ITEL, LLC 3

ONVOY SPECTRUM, LLC 2

PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 1

ONVOY, LLC - MA 1

MCIMETRO ACCESS TRANSMISSION SERVICES 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
—	978-586-0XXX	0000–0999	Reserved	PAETEC ITEL, LLC	829J	BOLTON	MA
2007-11-19	978-586-1XXX	1000–1999	Assigned	PAETEC ITEL, LLC	829J	BOLTON	MA
2017-01-04	978-586-2XXX	2000–2999	Assigned	ONVOY, LLC - MA	892D	BOLTON	MA
2007-07-20	978-586-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	BOLTON	MA
2021-02-01	978-586-4XXX	4000–4999	Assigned	ONVOY SPECTRUM, LLC	624H	BOLTON	MA
2012-09-14	978-586-5XXX	5000–5999	Assigned	PAETEC ITEL, LLC	829J	BOLTON	MA
2020-12-16	978-586-6XXX	6000–6999	Assigned	ONVOY SPECTRUM, LLC	624H	BOLTON	MA
—	978-586-7XXX	7000–7999	Available			BOLTON	MA
2015-09-28	978-586-8XXX	8000–8999	Assigned	IP HORIZON LLC	515J	BOLTON	MA
2013-04-05	978-586-9XXX	9000–9999	Assigned	PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA	268F	BOLTON	MA

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.