AS37917 — UTINS University of Tsukuba

AS37917 announces 3 IPv4 prefixes covering 132,096 addresses and 0 IPv6 prefixes.

About this network

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.

Announced prefixes

• 130.158.0.0/16
• 133.51.0.0/16
• 163.220.252.0/22

Upstream networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS63770 Industrial Cyber Security Center of Excellence

Adjacent networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS63770 Industrial Cyber Security Center of Excellence

Routing security

• RPKI: 0 valid, 0 invalid and 3 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 0% of announcements registered; 0 route objects.
• Listed in as-sets: AS-IIJ, AS-IIJ6, AS-MAFFIN-PEER, AS20965:AS-FROM-TEIN-TO-GEANT, AS2497:AS-IIJ, AS2497:AS-IIJ6.