AS103 — NWU-AS - Northwestern University

AS103 announces 22 IPv4 prefixes covering 149,504 addresses and 3 IPv6 prefixes.

About this network

An early allocation (NWU-AS) serving Northwestern University in Evanston, Illinois.

What it's used for

• Campus, research, and administrative networking for Northwestern University.

Notable

• An institutional / "eyeball" network for a research university, not commercial hosting. The low AS number reflects how early Northwestern connected, in the internet's first years.

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

Announced prefixes

• 8.28.178.0/23
• 8.30.248.0/22
• 38.124.97.0/24
• 129.105.0.0/16
• 165.124.0.0/17
• 165.124.128.0/19
• 165.124.160.0/20
• 165.124.176.0/21
• 165.124.184.0/23
• 165.124.186.0/24
• 165.124.192.0/19
• 165.124.224.0/21
• 165.124.232.0/22
• 165.124.240.0/20
• 192.5.143.0/24
• 192.26.85.0/24
• 192.26.86.0/23
• 192.31.253.0/24
• 199.74.64.0/18
• 199.249.165.0/24
• 199.249.166.0/23
• 199.249.168.0/23
• 2401:eee0:140::/42
• 2401:eee0:180::/42
• 2620:10d:2000::/41

Upstream networks

• AS2381 WiscNet
• AS174 Cogent Communications, LLC
• AS3356 Level 3 Parent, LLC
• AS22335 Metropolitan Research and Education Network
• AS33491 Comcast Cable Communications, LLC
• AS293 ESnet
• AS11537 Internet2
• AS11164 Internet2
• AS396450 Internet2
• AS149433 FM Networks

Adjacent networks

• AS2381 WiscNet
• AS174 Cogent Communications, LLC
• AS3356 Level 3 Parent, LLC
• AS22335 Metropolitan Research and Education Network
• AS33491 Comcast Cable Communications, LLC
• AS293 ESnet
• AS11537 Internet2
• AS11164 Internet2
• AS396450 Internet2
• AS149433 FM Networks

Routing security

• RPKI: 0 valid, 2 invalid and 28 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 90% of announcements registered; 41 route objects.
• Listed in as-sets: AS-COMCAST-EDIA, AS-GBLX, AS-HURRICANE, AS-HURRICANEV6, AS-ICN-CUSTOMERS, AS-STARTAPAP, AS-STARTAPCA, AS-STARTAPCN, AS-STARTAPEU, AS-STARTAPLA, AS-STARTAPME, AS-STARTAPRU, AS-SUMMIT, AS-TRANSROUTE-SPEC, AS-WISCNET-CDN, AS-WISCNET-WRIPS, AS-ZENEDGE, AS103:AS-ALL, AS198949:AS-SD, AS22335:AS-CUSTOMERS, AS23314:AS-ALL, AS3676:AS-UIOWA-PEERS-ANNOUNCE-CUST, AS6325:AS-ICN-HIGHERED.