NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 817-983

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 817-983 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 817 blocks

Most active assignees, all time — NPA 817
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 4
T-MOBILE USA, INC. 3
METROPCS, INC. 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 1
LEVEL 3 COMMUNICATIONS, LLC - TX 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
— 817-983-0XXX 0000–0999Reserved MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON TX
2005-11-30 817-983-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2011-06-13 817-983-2XXX 2000–2999Assigned METROPCS, INC. 5562 ARLINGTON TX
2005-11-30 817-983-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2007-11-20 817-983-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2010-08-26 817-983-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2010-08-26 817-983-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2007-01-17 817-983-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ARLINGTON TX
2005-12-21 817-983-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2005-12-21 817-983-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARLINGTON 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.