NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 410-401

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 410-401 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 410 blocks

Most active assignees, all time — NPA 410
PEERLESS NETWORK OF MARYLAND, LLC 3
ONVOY, LLC - MD 2
VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 1
TELEPORT COMMUNICATIONS AMERICA, LLC - MD 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - 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
2012-09-17 410-401-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BRYNPKLNCM MD
2012-09-17 410-401-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BRYNPKLNCM MD
2002-04-30 410-401-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 BRYNPKLNCM MD
2004-01-21 410-401-3XXX 3000–3999Assigned VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 4492 BRYNPKLNCM MD
2012-09-17 410-401-4XXX 4000–4999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BRYNPKLNCM MD
2016-03-16 410-401-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D BRYNPKLNCM MD
2016-09-15 410-401-6XXX 6000–6999Assigned IP HORIZON LLC 515J BRYNPKLNCM MD
2004-03-01 410-401-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 BRYNPKLNCM MD
2016-02-25 410-401-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D BRYNPKLNCM MD
— 410-401-9XXX 9000–9999Reserved MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 BRYNPKLNCM MD

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.