NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 667-444

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 667-444 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 667 blocks

Most active assignees, all time — NPA 667
PEERLESS NETWORK OF MARYLAND, LLC 3
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 3
ONVOY, LLC - MD 2
IP HORIZON LLC 1
CORE COMMUNICATIONS, INC.- MD 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
2015-10-21 667-444-0XXX 0000–0999Assigned IP HORIZON LLC 515J BALTIMORE MD
2016-01-07 667-444-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2016-10-12 667-444-2XXX 2000–2999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BALTIMORE MD
2016-10-12 667-444-3XXX 3000–3999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BALTIMORE MD
2015-08-18 667-444-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D BALTIMORE MD
2015-08-18 667-444-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D BALTIMORE MD
2019-03-27 667-444-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 BALTIMORE MD
2016-10-12 667-444-7XXX 7000–7999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BALTIMORE MD
2016-01-07 667-444-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2016-01-07 667-444-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD

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.