NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 203-295

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 203-295 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 203 blocks

Most active assignees, all time — NPA 203
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 3
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 3
LEVEL 3 COMMUNICATIONS, LLC - CT 2
CSC VOICE, LLC 1
BANDWIDTH.COM CLEC, LLC - CT 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
— 203-295-0XXX 0000–0999Reserved MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 NORWALK CT
2012-08-06 203-295-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
— 203-295-2XXX 2000–2999Reserved MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 NORWALK CT
2008-02-06 203-295-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NORWALK CT
2010-10-29 203-295-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NORWALK CT
2012-08-06 203-295-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
— 203-295-6XXX 6000–6999Reserved MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 NORWALK CT
2010-11-09 203-295-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NORWALK CT
2011-04-05 203-295-8XXX 8000–8999Assigned CSC VOICE, LLC 612K NORWALK CT
2012-08-06 203-295-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT

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.