NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 276-403

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 276-403 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 276 blocks

Most active assignees, all time — NPA 276
BANDWIDTH.COM CLEC, LLC - VA 5
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 2
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 1
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
2008-11-06 276-403-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F MARTINSVL VA
2020-08-12 276-403-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MARTINSVL VA
2014-05-15 276-403-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MARTINSVL VA
2013-03-13 276-403-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F MARTINSVL VA
2013-01-09 276-403-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F MARTINSVL VA
2003-07-09 276-403-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F MARTINSVL VA
— 276-403-6XXX 6000–6999Assigned (pending) MARTINSVL VA
2012-03-16 276-403-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MARTINSVL VA
2015-11-20 276-403-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MARTINSVL VA
2002-06-05 276-403-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F MARTINSVL VA

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.