NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 920-866

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 920-866 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 920 blocks

Most active assignees, all time — NPA 920
BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 6
NEW CINGULAR WIRELESS PCS, LLC - IL 2
TWC IP ENABLED SERVICES, LLC 1
LEVEL 3 COMMUNICATIONS, LLC - WI 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
2017-03-07 920-866-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWFRANKEN WI
— 920-866-1XXX 1000–1999Reserved BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 NEWFRANKEN WI
— 920-866-2XXX 2000–2999Reserved BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 NEWFRANKEN WI
— 920-866-3XXX 3000–3999Reserved BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 NEWFRANKEN WI
2013-11-13 920-866-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K NEWFRANKEN WI
2014-10-23 920-866-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 NEWFRANKEN WI
— 920-866-6XXX 6000–6999Reserved BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 NEWFRANKEN WI
— 920-866-7XXX 7000–7999Reserved BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 NEWFRANKEN WI
2016-04-20 920-866-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWFRANKEN WI
— 920-866-9XXX 9000–9999Reserved BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 NEWFRANKEN WI

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.