AS823 University of Western Ontario

UWO-AS - University of Western Ontario · registered in Canada

IPv4 addresses65,79212 prefixes · 0.002% of announced IPv4

Rank in Canada#85largest network in CA by IPv4 space, of 1,575 · 0.12% of CA

Rank worldwide#2,754of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryCanada1,622 ASNs registered there

Open AS823 in ASN lookup Look up an IP in this network (129.100.0.1) All networks in Canada

IPv4 prefixes

All 12 prefixes, in address order.

129.100.0.0/17
129.100.128.0/18
129.100.192.0/23
129.100.194.0/23
129.100.196.0/22
129.100.200.0/22
129.100.204.0/24
129.100.205.0/24
129.100.206.0/23
129.100.208.0/20
129.100.224.0/19
205.189.1.0/24

IPv6 prefixes

All 1 prefix.

2605:500::/32

Similar-sized networks in Canada

ASNNameIPv4 addresses

AS23237#82 MCMASTER - McMaster University66,048

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

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

AS12093#86 UWATERLOO - University of Waterloo65,792

AS26206#87 ASN-UREGINA - University of Regina65,792

AS33602#88 TELUQ - Tele-Universite65,792

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