AS2015 — MSEN-SYSTEM

AS2015 announces 9 IPv4 prefixes covering 4,608 addresses and 0 IPv6 prefixes.

About this network

MSEN-SYSTEM is Msen, Inc., one of Michigan's oldest commercial internet service providers, based in Ann Arbor and operating since the early 1990s.

What it's used for

• Internet access and hosting for customers in Michigan.

Notable

• A genuine early ISP: the low AS number was allocated in 1992, when Msen was among the first commercial providers to connect.

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

Announced prefixes

• 148.59.14.0/24
• 148.59.19.0/24
• 148.59.21.0/24
• 148.59.50.0/24
• 148.59.80.0/21
• 198.11.32.0/24
• 198.11.56.0/23
• 198.11.62.0/23
• 198.202.235.0/24

Upstream networks

• AS12129 123.Net, Inc.
• AS20473 The Constant Company, LLC

Adjacent networks

• AS12129 123.Net, Inc.
• AS20473 The Constant Company, LLC