NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 978-401

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 978-401 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
METROPCS, INC. 5
LEVEL 3 COMMUNICATIONS, LLC - MA 3
PAETEC ITEL, 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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
— 978-401-0XXX 0000–0999Reserved LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LEOMINSTER MA
2008-07-23 978-401-1XXX 1000–1999Assigned METROPCS, INC. 5562 LEOMINSTER MA
2013-09-09 978-401-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LEOMINSTER MA
2003-08-11 978-401-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J LEOMINSTER MA
2004-08-06 978-401-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LEOMINSTER MA
2006-01-06 978-401-5XXX 5000–5999Assigned METROPCS, INC. 5562 LEOMINSTER MA
2014-11-21 978-401-6XXX 6000–6999Assigned METROPCS, INC. 5562 LEOMINSTER MA
2008-07-23 978-401-7XXX 7000–7999Assigned METROPCS, INC. 5562 LEOMINSTER MA
2008-07-23 978-401-8XXX 8000–8999Assigned METROPCS, INC. 5562 LEOMINSTER MA
— 978-401-9XXX 9000–9999Reserved LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LEOMINSTER 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.