ASN AS5739 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS5739?

AS5739 is listed under University of California, Santa Cruz.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS5739 University of California, Santa Cruz

ASN Lookup Tool

University of California, Santa Cruz ucsc.edu

US 3 Routes

AS Data

AS5739

AS5739 – University of California, Santa Cruz

AS Number	5739
AS Name	UCSC
Organization	University of California, Santa Cruz(ucsc)
Country	US
Website	ucsc.edu
Number of IPv4 Routes	2
Number of IPv6 Routes	1
ASN type	EDUCATION
Registry	ARIN
Date Allocated	1995-09-13

ASN Intelligence API for production workflows

Use ASN data for AS5739 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
2607:f5f0::/32	AS5739	University of California, Santa Cruz	University of California, Santa Cruz	~79×10²⁷
128.114.0.0/16	AS5739	University of California, Santa Cruz	University of California, Santa Cruz	65536
169.233.0.0/16	AS5739	University of California, Santa Cruz	University of California, Santa Cruz	65536

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       5739
ASName:         UCSC
ASHandle:       AS5739
RegDate:        1995-09-13
Updated:        2011-06-29    
Ref:            https://rdap.arin.net/registry/autnum/5739


OrgName:        University of California, Santa Cruz
OrgId:          UCSC
Address:        University of California, Santa Cruz
Address:        Information Technology Services
Address:        Communications Building
Address:        620 Baskin Circle
City:           Santa Cruz
StateProv:      CA
PostalCode:     95064
Country:        US
RegDate:        1986-03-05
Updated:        2024-11-25
Ref:            https://rdap.arin.net/registry/entity/UCSC


OrgNOCHandle: UCSCN-ARIN
OrgNOCName:   Network Operations Center
OrgNOCPhone:  +1-831-459-2714 
OrgNOCEmail:  noc@ucsc.edu
OrgNOCRef:    https://rdap.arin.net/registry/entity/UCSCN-ARIN

OrgTechHandle: UCSCN-ARIN
OrgTechName:   Network Operations Center
OrgTechPhone:  +1-831-459-2714 
OrgTechEmail:  noc@ucsc.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/UCSCN-ARIN

OrgAbuseHandle: UCSCN1-ARIN
OrgAbuseName:   UCSC Security
OrgAbusePhone:  +1-831-459-2714 
OrgAbuseEmail:  abuse@ucsc.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/UCSCN1-ARIN

RTechHandle: UCSCN-ARIN
RTechName:   Network Operations Center
RTechPhone:  +1-831-459-2714 
RTechEmail:  noc@ucsc.edu
RTechRef:    https://rdap.arin.net/registry/entity/UCSCN-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number	Description	Country
AS2153	CENIC	US
AS2152	CENIC	US

Upstreams

AS Number	Description	Country
AS2153	CENIC	US
AS2152	CENIC	US

Contacts

Email Contacts

noc@ucsc.edu

Abuse Contacts

abuse@ucsc.edu