AS33503 Medical College of Wisconsin

MCW-1-AS - Medical College of Wisconsin · registered in the United States

IPv4 addresses65,53619 prefixes · 0.002% of announced IPv4

Rank in United States#1,043largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#2,954of 79,396 networks with IPv4

IPv616 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS33503 in ASN lookup Look up an IP in this network (141.106.0.1) All networks in United States

IPv4 prefixes

All 19 prefixes, in address order.

141.106.0.0/21
141.106.8.0/22
141.106.12.0/24
141.106.13.0/24
141.106.14.0/23
141.106.16.0/20
141.106.32.0/19
141.106.64.0/22
141.106.68.0/23
141.106.70.0/23
141.106.72.0/21
141.106.80.0/20
141.106.96.0/20
141.106.112.0/23
141.106.114.0/24
141.106.115.0/24
141.106.116.0/22
141.106.120.0/21
141.106.128.0/17

IPv6 prefixes

All 1 prefix.

2620:10d::/44

Similar-sized networks in United States

ASNNameIPv4 addresses

AS46476#1040 TTUHSC - Texas Tech University Health Sciences Center65,536

AS2936#1041 NERSC - National Energy Research Scientific Computing Center65,536

AS3659#1042 CLAREMONT - Claremont University Consortium65,536

AS33703#1044 HOFSTRA-UNIVERSITY - Hofstra University65,536

AS70#1045 NLM-GW - National Library of Medicine65,536

AS3495#1046 SENATE-AS - US Senate65,536

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources