NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 641-931

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 641-931 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 641 blocks

Most active assignees, all time — NPA 641
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 3
WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1
ONVOY, LLC - IA 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 1
LEVEL 3 COMMUNICATIONS, LLC - IA 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
— 641-931-0XXX 0000–0999Reserved CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 ALBIA IA
2012-01-31 641-931-1XXX 1000–1999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 ALBIA IA
2018-05-02 641-931-2XXX 2000–2999Assigned INTEGRATED PATH COMMUNCATIONS, LLC - IA 544H ALBIA IA
2017-04-07 641-931-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ALBIA IA
2019-10-31 641-931-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F ALBIA IA
2017-06-07 641-931-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBIA IA
— 641-931-6XXX 6000–6999Reserved CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 ALBIA IA
— 641-931-7XXX 7000–7999Reserved CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 ALBIA IA
2019-11-04 641-931-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 ALBIA IA
2014-10-10 641-931-9XXX 9000–9999Assigned AUREON COMMUNICATIONS, LLC 444G ALBIA IA

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.