NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 903-259

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 903-259 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 903 blocks

Most active assignees, all time — NPA 903
NEW CINGULAR WIRELESS PCS, LLC - IL 4
T-MOBILE USA, INC. 3
TWC IP ENABLED SERVICES, LLC 1
TELEPORT COMMUNICATIONS AMERICA, LLC - TX 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 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
2012-12-07 903-259-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GREENVILLE TX
2016-01-04 903-259-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GREENVILLE TX
2014-09-09 903-259-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GREENVILLE TX
2010-06-11 903-259-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GREENVILLE TX
2007-08-02 903-259-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 GREENVILLE TX
2006-02-23 903-259-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 GREENVILLE TX
2006-08-17 903-259-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K GREENVILLE TX
2007-08-02 903-259-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 GREENVILLE TX
2015-04-22 903-259-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GREENVILLE TX
2007-04-30 903-259-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 GREENVILLE TX

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.