NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 806-421

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 806-421 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 806 blocks

Most active assignees, all time — NPA 806
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 4
NEW CINGULAR WIRELESS PCS, LLC - IL 2
LEVEL 3 COMMUNICATIONS, LLC - TX 2
TELEPORT COMMUNICATIONS AMERICA, LLC - TX 1
T-MOBILE USA, INC. 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
2007-11-14 806-421-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 DUMAS TX
2010-02-02 806-421-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DUMAS TX
2011-03-15 806-421-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 DUMAS TX
2016-09-02 806-421-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 DUMAS TX
2018-12-21 806-421-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUMAS TX
2020-03-31 806-421-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUMAS TX
2008-11-20 806-421-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 DUMAS TX
2013-03-13 806-421-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 DUMAS TX
2008-04-15 806-421-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 DUMAS TX
2008-04-15 806-421-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 DUMAS TX

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.