Autonomous system
AS5739 UCSC
Education ARIN
Summary
University of California, Santa Cruz
education university research legacy
UCSC is the University of California, Santa Cruz, a public research university on California's central coast and a campus of the University of California system.
What it's used for
- Campus networking for UCSC: student and staff devices, residential halls, labs, libraries and administrative systems, plus the university's public-facing web and research services.
Notable
- An institutional network rather than a commercial one. Addresses here belong to a single campus community, so they cluster tightly in Santa Cruz County.
- UCSC's ARIN organisation record dates back to 1986 and the ASN to 1995, consistent with a university that was on the internet well before the commercial era.
Interesting
- UCSC hosts the Genomics Institute, whose UCSC Genome Browser is one of the most widely used public resources in biology, so a meaningful share of this network's outbound traffic is scientific data rather than campus browsing.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 131K addresses IPv6 3 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 7 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS5739- Registry name
- UCSC
- Registrant
- University of California, Santa Cruz
- Abuse contact
- abuse@ucsc.edu
- Registered
- 1995-09-13
- Last changed
- 2011-06-29
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 33% valid · 1 valid, 2 with no ROA
- ROAs
- 3 authorising AS5739
- ASPA
- no ASPA record
- IRR
- 100% registered · 3 of 3 announcements
- Route objects
- 8 naming AS5739
Reputation
Classification and threat
Education University, school or national research and education network.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,781 prefixes, as published 2026-10-16. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere