AS2543 University of California, Irvine

UCIMC-AS - University of California, Irvine · registered in the United States

IPv4 addresses41 prefixes · <0.001% of announced IPv4

Rank in United States#18,336largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#79,392of 79,396 networks with IPv4

IPv664 addresses (smaller than a /48)1 prefixes

CountryUnited States18,679 ASNs registered there

Open AS2543 in ASN lookup Look up an IP in this network (137.164.38.109) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

137.164.38.108/30

IPv6 prefixes

All 1 prefix.

2607:f380::118:9a42:66c0/122

Other ASNs named University of California, Irvine

1 other network uses the same organisation name; together with AS2543 they announce 262,408 IPv4 addresses.

ASNNameIPv4 addresses

AS299UCINET-AS - University of California, Irvine US262,404

Similar-sized networks in United States

ASNNameIPv4 addresses

AS63256#18333 NYSBC - New York Structural Biology Center, Inc.128

AS33585#18334 NEWPORTBEACH-ASN01 - City of Newport Beach34

AS3939#18335 NTTA-3936 - NTT America, Inc.32

AS13979#18337 ATT-IPFR - AT&T Enterprises, LLC4

AS46750#18338 STANFORD-INTERNET-ACCESS2 - Stanford University2

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