AS23237 McMaster University

MCMASTER - McMaster University · registered in Canada

IPv4 addresses66,04810 prefixes · 0.002% of announced IPv4

Rank in Canada#82largest network in CA by IPv4 space, of 1,575 · 0.12% of CA

Rank worldwide#2,719of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryCanada1,622 ASNs registered there

Open AS23237 in ASN lookup Look up an IP in this network (130.113.0.1) All networks in Canada

IPv4 prefixes

All 10 prefixes, in address order.

130.113.0.0/18
130.113.64.0/19
130.113.96.0/21
130.113.104.0/22
130.113.108.0/23
130.113.110.0/23
130.113.112.0/20
130.113.128.0/17
192.42.5.0/24
192.42.6.0/24

IPv6 prefixes

All 1 prefix.

2604:1700::/48

Similar-sized networks in Canada

ASNNameIPv4 addresses

AS46626#79 SICKKIDS-AS-01 - The Hospital for Sick Children66,304

AS393981#80 UNBC - The University of Northern British Columbia66,304

AS13657#81 E-GATE-COMMUNICATIONS - E-Gate Communications Inc.66,048

AS32347#83 PRAN-ASN - Sir Sandford Fleming College of Applied Arts and Technology66,048

AS33091#84 U-CALGARY - University of Calgary66,048

AS823#85 UWO-AS - University of Western Ontario65,792

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