NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 734-328

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 734-328 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 734 blocks

Most active assignees, all time — NPA 734
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 2
BANDWIDTH.COM CLEC, LLC - MI 2
TON80 COMMUNICATIONS, LLC 1
PEERLESS NETWORK OF MICHIGAN, LLC - MI 1
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, 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
— 734-328-0XXX 0000–0999Reserved LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BELLEVILLE MI
2014-01-28 734-328-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BELLEVILLE MI
2010-08-12 734-328-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BELLEVILLE MI
2026-05-27 734-328-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELLEVILLE MI
2010-09-07 734-328-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BELLEVILLE MI
2021-06-17 734-328-5XXX 5000–5999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G BELLEVILLE MI
2025-03-12 734-328-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BELLEVILLE MI
2022-03-04 734-328-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J BELLEVILLE MI
— 734-328-8XXX 8000–8999Available BELLEVILLE MI
2022-08-12 734-328-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BELLEVILLE MI

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.