NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 410-214

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 410-214 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
CORE COMMUNICATIONS, INC.- MD 6
LEVEL 3 COMMUNICATIONS, LLC - MD 1
COMCAST IP PHONE, LLC 1
BOOST SUBSCRIBERCO L.L.C. 1
ARMSTRONG TELECOMMUNICATIONS, 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
2009-03-12 410-214-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 RISING SUN MD
2018-05-23 410-214-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 RISING SUN MD
2017-06-13 410-214-2XXX 2000–2999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - MD 420C RISING SUN MD
2018-05-23 410-214-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 RISING SUN MD
2018-05-23 410-214-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 RISING SUN MD
2023-06-20 410-214-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 RISING SUN MD
2025-09-03 410-214-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J RISING SUN MD
2023-01-30 410-214-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J RISING SUN MD
2019-06-10 410-214-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 RISING SUN MD
2019-06-10 410-214-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC.- MD 2593 RISING SUN 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.