asn.dev

Autonomous system

AS37917 UTINS University of Tsukuba

Unclassified APNIC

IPv4 addresses 132K 3 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly JP
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

University of Tsukuba

Japan · AI-generated

education research university

UTINS is the autonomous system for the University of Tsukuba.

What it's used for

  • The address space carries university infrastructure, evidenced by the netnames UTINS and UTINS-CIDR-BLK-JP and a reverse DNS record pointing to chris00.omni.hpcc.jp, a host within the university's High Performance Computing Center.
  • The AS announces 132096 IPv4 addresses across 3 prefixes while maintaining only 2 observed neighbours, a ratio characteristic of an isolated institutional network rather than a transit provider.
  • Traffic consists of academic research, high-performance computing, and general campus connectivity for students and faculty.

Notable

  • Registrants for the UTINS and UTINS-CIDR-BLK-JP prefixes align with the announcer, while the 133.51.0.0/16 block is registered under JPNIC-NET-JP-ERX with the Japan Network Information Center as the registrant.
  • The inventory consists of two /16 blocks and one /22 block, all located in Japan.

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
AS2907Research Organization of Information and Systems, National Institute of Informatics152
AS63770Industrial Cyber Security Center of Excellence33

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, 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 3 prefixes · 132K addresses IPv6 0 prefixes

CountryNamePrefixes
JPJapan3

Registry

Allocation record

APNIC · via Atlas (registry data)
Registry
APNIC
Registered
2006-01-30
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 3 with no ROA
ROAs
0 authorising AS37917
ASPA
no ASPA record
IRR
0% registered · 0 of 3 announcements
Route objects
0 naming AS37917

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: 431 networks and 1,768 prefixes, as published 2026-10-12. 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