AS6479 — MCHENRY

Network type: residential

AS6479 announces 1 IPv4 prefixes covering 16,384 addresses and 1 IPv6 prefixes.

About this network

McHenryCom Company, trading as MC.net — an independent internet service provider based in Cary, Illinois, serving the north-west Chicago suburbs.

What it's used for

• Residential and small-business internet access across McHenry, Lake, DuPage, Cook, and Kane counties in Illinois, plus web hosting and IT services.
• It announces 209.172.128.0/18 (assigned to McHenryCom by ARIN in 1997) and an IPv6 /32. Reverse DNS across the space resolves under mc.net, including network gateways, which is the giveaway that this is a real access network rather than parked space.

Notable

• A genuinely small regional ISP holding a four-digit AS number: the ARIN record dates to April 1996, in the sequential run of assignments made across the mid-6400s.
• Independent ISPs of this vintage are increasingly rare in the US; most were bought out by cable and telco incumbents.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 209.172.128.0/18
• 2607:fcb8::/32

Upstream networks

• AS33491 Comcast Cable Communications, LLC
• AS7018 AT&T Enterprises, LLC

Adjacent networks

• AS33491 Comcast Cable Communications, LLC
• AS7018 AT&T Enterprises, LLC