AS36691 Colorado State University

CSUP-AS - Colorado State University · registered in the United States

IPv4 addresses65,5361 prefixes · 0.002% of announced IPv4

Rank in United States#1,252largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#3,337of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS36691 in ASN lookup Look up an IP in this network (158.142.0.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

158.142.0.0/16

Other ASNs named Colorado State University

1 other network uses the same organisation name; together with AS36691 they announce 147,200 IPv4 addresses.

ASNNameIPv4 addresses

AS12145COLORADOSTATEUNIV - Colorado State University US81,664

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ASNNameIPv4 addresses

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AS40102#1254 AS-MONTGOMERY-COLLEGE-AS1 - Montgomery College65,536

AS40112#1255 OPPD-AS - Omaha Public Power District65,536

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