AS40387 University of Illinois

UI-ICCN - University of Illinois · registered in the United States

IPv4 addresses2,0449 prefixes · <0.001% of announced IPv4

Rank in United States#6,506largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#24,574of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS40387 in ASN lookup Look up an IP in this network (72.36.120.1) All networks in United States

IPv4 prefixes

All 9 prefixes, in address order.

72.36.120.0/22
72.36.124.0/23
72.36.126.0/24
72.36.127.0/25
72.36.127.128/28
72.36.127.144/30
72.36.127.152/29
72.36.127.160/27
72.36.127.192/26

IPv6 prefixes

All 1 prefix.

2620:0:e10::/48

Other ASNs named University of Illinois

4 other networks use the same organisation name; together with AS40387 they announce 291,580 IPv4 addresses.

ASNNameIPv4 addresses

AS38UIUC - University of Illinois US210,944

AS1224NCSA-AS - University of Illinois US65,792

AS698ASN-UIUC-REGION-AS - University of Illinois US12,288

AS10764STARTAP - University of Illinois US512

Similar-sized networks in United States

ASNNameIPv4 addresses

AS402133#6503 NOVOSERVE-LLC-CUSTOMERS-AS - NovoServe LLC2,048

AS402165#6504 BROWSERSTACK INC - Browserstack, Inc.2,048

AS402267#6505 HADOOPSKY - Hadoopsky LLC2,048

AS393536#6507 NTTDATA-RAGINGWIRE - NTT DATA AMERICAS, INC1,880

AS23013#6508 FORTANIX - Fortanix1,848

AS26478#6509 NOVARTIS-PHARMA - Novartis Pharmaceuticals1,808

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