AS9 — CMU-ROUTER

AS9 announces 9 IPv4 prefixes covering 133,634 addresses and 16 IPv6 prefixes.

About this network

One of the oldest allocations on the internet (CMU-ROUTER), serving Carnegie Mellon University in Pittsburgh, Pennsylvania.

What it's used for

• Campus, research, and administrative networking for the university.

Notable

• A single-digit AS number reflects how early CMU connected, handed out sequentially in the internet's first years.

Interesting

• CMU has deep roots in computing and networking research, including the early Andrew system and a long line of internet-related work.

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

Announced prefixes

• 128.2.0.0/16
• 128.237.0.0/16
• 137.164.1.144/31
• 192.5.146.0/24
• 192.12.32.0/24
• 192.58.107.0/24
• 192.80.210.0/24
• 204.194.28.0/22
• 209.129.244.0/23
• 2607:fb28::/44
• 2607:fb28:11::/48
• 2607:fb28:12::/47
• 2607:fb28:14::/46
• 2607:fb28:18::/45
• 2607:fb28:20::/43
• 2607:fb28:40::/42
• 2607:fb28:80::/41
• 2607:fb28:100::/40
• 2607:fb28:200::/39
• 2607:fb28:400::/38
• 2607:fb28:800::/37
• 2607:fb28:1000::/36
• 2607:fb28:2000::/35
• 2607:fb28:4000::/34
• 2607:fb28:8000::/33

Upstream networks

• AS6461 Zayo Bandwidth
• AS399855 Keystone REN, LLC
• AS3356 Level 3 Parent, LLC
• AS5050 Pittsburgh Supercomputing Center
• AS2153 CENIC

Adjacent networks

• AS6461 Zayo Bandwidth
• AS399855 Keystone REN, LLC
• AS3356 Level 3 Parent, LLC
• AS5050 Pittsburgh Supercomputing Center
• AS2153 CENIC