Thousands-blocks in 978-403

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 978-403 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

ONVOY, LLC - MA 3

PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 2

MCIMETRO ACCESS TRANSMISSION SERVICES LLC 1

IP HORIZON LLC 1

COMCAST IP PHONE, 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
2011-03-21	978-403-0XXX	0000–0999	Assigned	BANDWIDTH.COM CLEC, LLC - MA	990E	LUNENBURG	MA
2015-09-28	978-403-1XXX	1000–1999	Assigned	IP HORIZON LLC	515J	LUNENBURG	MA
2016-02-24	978-403-2XXX	2000–2999	Assigned	ONVOY, LLC - MA	892D	LUNENBURG	MA
2011-11-16	978-403-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	LUNENBURG	MA
2012-02-16	978-403-4XXX	4000–4999	Assigned	ONVOY, LLC - MA	892D	LUNENBURG	MA
2015-01-30	978-403-5XXX	5000–5999	Assigned	COMCAST IP PHONE, LLC	318J	LUNENBURG	MA
2016-02-24	978-403-6XXX	6000–6999	Assigned	ONVOY, LLC - MA	892D	LUNENBURG	MA
—	978-403-7XXX	7000–7999	Assigned (pending)			LUNENBURG	MA
2013-04-05	978-403-8XXX	8000–8999	Assigned	PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA	268F	LUNENBURG	MA
2013-04-05	978-403-9XXX	9000–9999	Assigned	PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA	268F	LUNENBURG	MA

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.