asn.dev

Autonomous system

AS26397 OPTIPUTER

Unclassified ARIN

IPv4 addresses 6.77K 11 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 6 see address space

Summary

UC San Diego

United States of America · AI-generated

education research university

OPTIPUTER is the autonomous system for The Regents of the University of California - University of California, San Diego.

What it's used for

  • The address space carries university infrastructure, evidenced by netnames OPTIPUTER-NET and UCSD-NET-169-228 and reverse DNS entries like gftp.t2.ucsd.edu and sdsc-28.t2.ucsd.edu.
  • The AS announces 6768 IPv4 addresses across 11 prefixes and 1 IPv6 prefix, with only 2 observed neighbours, indicating a self-contained academic network rather than a transit provider.

Notable

  • Registrants consistently identify the holder as The Regents of the University of California - University of California, San Diego, with some prefixes specifically registered to University of California, San Diego.
  • The inventory is finely subdivided, including multiple small blocks within the 67.58.53.0/24 range, reflecting internal site-by-site segmentation typical of a large campus.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS7377University of California, San Diego57
AS2153CENIC26

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

Shape and geography

IPv4 11 prefixes · 6.77K addresses IPv6 1 prefixes

CountryNamePrefixes
USUnited States of America12

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS26397
Registry name
OPTIPUTER
Registrant
The Regents of the University of California - University of California, San Diego.
Abuse contact
architects@ucsd.edu
Registered
2006-12-21
Last changed
2015-10-19
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
50% valid · 2 valid, 2 with no ROA
ROAs
5 authorising AS26397
ASPA
no ASPA record
IRR
50% registered · 2 of 4 announcements 1 other origin
Route objects
6 naming AS26397

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

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

Cross-check