AS1657 University of Louisville

LOUISVILLE - University of Louisville · registered in the United States

IPv4 addresses65,5369 prefixes · 0.002% of announced IPv4

Rank in United States#1,047largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#2,960of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS1657 in ASN lookup Look up an IP in this network (136.165.0.1) All networks in United States

IPv4 prefixes

All 9 prefixes, in address order.

136.165.0.0/17
136.165.128.0/18
136.165.192.0/19
136.165.224.0/20
136.165.240.0/22
136.165.244.0/24
136.165.245.0/24
136.165.246.0/23
136.165.248.0/21

IPv6 prefixes

All 1 prefix.

2610:1e0:1800::/48

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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