NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 551-444

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 551-444 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 551 blocks

Most active assignees, all time — NPA 551
PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 2
ONVOY, LLC - NJ 2
OMNIPOINT COMMUNICATIONS, INC. - NJ 2
CENTURYLINK COMMUNICATIONS, LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 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
2013-03-20 551-444-0XXX 0000–0999Assigned PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F FAIR LAWN NJ
2013-03-20 551-444-1XXX 1000–1999Assigned PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F FAIR LAWN NJ
2013-10-24 551-444-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 FAIR LAWN NJ
2013-11-21 551-444-3XXX 3000–3999Assigned CABLEVISION LIGHTPATH, INC. - NJ 4948 FAIR LAWN NJ
2016-04-01 551-444-4XXX 4000–4999Assigned ONVOY, LLC - NJ 637C FAIR LAWN NJ
2013-11-19 551-444-5XXX 5000–5999Assigned ONVOY, LLC - NJ 637C FAIR LAWN NJ
2014-04-02 551-444-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NJ 118F FAIR LAWN NJ
2014-02-18 551-444-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FAIR LAWN NJ
2014-02-24 551-444-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 FAIR LAWN NJ
2013-10-14 551-444-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 FAIR LAWN NJ

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.