AS5739 University of California, Santa Cruz

UCSC - University of California, Santa Cruz · registered in the United States

IPv4 addresses131,0764 prefixes · 0.004% of announced IPv4

Rank in United States#504largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#1,544of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)3 prefixes

CountryUnited States18,679 ASNs registered there

Open AS5739 in ASN lookup Look up an IP in this network (128.114.0.1) All networks in United States

IPv4 prefixes

All 4 prefixes, in address order.

128.114.0.0/16
137.164.3.48/31
137.164.23.182/31
169.233.0.0/16

IPv6 prefixes

All 3 prefixes.

2607:f380::118:9a40:3300/123
2607:f380:1::118:9a41:7b60/123
2607:f5f0::/32

Similar-sized networks in United States

ASNNameIPv4 addresses

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AS36081#502 STATE-OF-COLORADO-MNT-NETWORK - The Governor's Office of Information Technology131,328

AS3676#503 UIOWA-AS - University of Iowa131,326

AS16#505 LBL - Lawrence Berkeley National Laboratory131,076

AS10242#506 USINTERNET - US Internet Corp131,072

AS3778#507 TEMPLE - Temple University131,072

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