NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 551-285

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 551-285 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
ONVOY, LLC - NJ 2
OMNIPOINT COMMUNICATIONS, INC. - NJ 2
NEW CINGULAR WIRELESS PCS, LLC - DC 2
PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 1
PAETEC ITEL, 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
2019-07-02 551-285-0XXX 0000–0999Assigned ONVOY, LLC - NJ 637C RUTHERFORD NJ
2019-07-02 551-285-1XXX 1000–1999Assigned ONVOY, LLC - NJ 637C RUTHERFORD NJ
2018-09-17 551-285-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF NEW JERSEY, LP - NJ 2771 RUTHERFORD NJ
2018-10-19 551-285-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J RUTHERFORD NJ
2018-09-20 551-285-4XXX 4000–4999Assigned PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F RUTHERFORD NJ
2018-09-07 551-285-5XXX 5000–5999Assigned BLUEBIRD COMMUNICATIONS, LLC - NJ 999H RUTHERFORD NJ
2018-08-29 551-285-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RUTHERFORD NJ
2018-08-29 551-285-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RUTHERFORD NJ
2018-08-27 551-285-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 RUTHERFORD NJ
2018-08-27 551-285-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 RUTHERFORD 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.