NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 608-636

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 608-636 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 608 blocks

Most active assignees, all time — NPA 608
UNITED STATES CELLULAR - WI 5
TELEPORT COMMUNICATIONS AMERICA, LLC WI 1
ONVOY, LLC - WI 1
LEVEL 3 COMMUNICATIONS, LLC - WI 1
CHARTER IP ENABLED SERVICES, 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
2003-11-25 608-636-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 NEW GLARUS WI
2020-02-25 608-636-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 NEW GLARUS WI
2007-02-27 608-636-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K NEW GLARUS WI
2008-04-23 608-636-3XXX 3000–3999Assigned UNITED STATES CELLULAR - WI 6274 NEW GLARUS WI
2014-02-25 608-636-4XXX 4000–4999Assigned UNITED STATES CELLULAR - WI 6274 NEW GLARUS WI
2015-01-05 608-636-5XXX 5000–5999Assigned UNITED STATES CELLULAR - WI 6274 NEW GLARUS WI
2016-05-11 608-636-6XXX 6000–6999Assigned UNITED STATES CELLULAR - WI 6274 NEW GLARUS WI
2017-09-21 608-636-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 NEW GLARUS WI
2020-05-18 608-636-8XXX 8000–8999Assigned ONVOY, LLC - WI 225C NEW GLARUS WI
2018-09-17 608-636-9XXX 9000–9999Assigned UNITED STATES CELLULAR - WI 6274 NEW GLARUS 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.