NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 641-205

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 641-205 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
LOCAL TELEPHONE DATA SERVICES CORP. 4
NEW CINGULAR WIRELESS PCS, LLC - IL 2
UNITED STATES CELLULAR - IA 1
MCC TELEPHONY OF IOWA, LLC - IA 1
INTEGRATED PATH COMMUNCATIONS, 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
— 641-205-0XXX 0000–0999Reserved LOCAL TELEPHONE DATA SERVICES CORP. 2842 KNOXVILLE IA
— 641-205-1XXX 1000–1999Reserved LOCAL TELEPHONE DATA SERVICES CORP. 2842 KNOXVILLE IA
2022-09-06 641-205-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KNOXVILLE IA
— 641-205-3XXX 3000–3999Reserved LOCAL TELEPHONE DATA SERVICES CORP. 2842 KNOXVILLE IA
2020-09-16 641-205-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KNOXVILLE IA
2018-05-03 641-205-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNCATIONS, LLC - IA 544H KNOXVILLE IA
— 641-205-6XXX 6000–6999Reserved LOCAL TELEPHONE DATA SERVICES CORP. 2842 KNOXVILLE IA
2016-12-07 641-205-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KNOXVILLE IA
2010-03-02 641-205-8XXX 8000–8999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F KNOXVILLE IA
2015-12-16 641-205-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 KNOXVILLE 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.