NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 978-451

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 978-451 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
LEVEL 3 COMMUNICATIONS, LLC - MA 4
VERIZON NEW ENGLAND INC. 1
PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 1
ONVOY, LLC - MA 1
IP HORIZON 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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2004-12-29 978-451-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CONCORD MA
2013-04-05 978-451-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CONCORD MA
— 978-451-2XXX 2000–2999Available CONCORD MA
2006-09-27 978-451-3XXX 3000–3999Assigned VERIZON NEW ENGLAND INC. 9102 CONCORD MA
2003-12-22 978-451-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CONCORD MA
2023-05-09 978-451-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CONCORD MA
2006-01-03 978-451-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CONCORD MA
2006-01-03 978-451-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CONCORD MA
2016-06-01 978-451-8XXX 8000–8999Assigned IP HORIZON LLC 515J CONCORD MA
2023-10-05 978-451-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D CONCORD 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.