AS55904 — KOGAKUIN-AS KOGAKUIN University

AS55904 announces 1 IPv4 prefixes covering 65,536 addresses and 1 IPv6 prefixes.

About this network

KOGAKUIN-AS is operated by Kogakuin University.

What it's used for

• The address space carries university infrastructure, evidenced by the reverse DNS record ax14f.cc.kogakuin.ac.jp and the registrant netname JPNIC-NET-JP-ERX.
• The AS announces 65536 IPv4 addresses within a single /16 prefix and 1 IPv6 prefix, with only 2 observed routing neighbours, indicating a small, self-contained institutional network rather than a transit or large-scale access provider.
• Traffic consists of internal university services, research systems, and administrative endpoints for the institution located in Shinjuku, Tokyo.

Notable

• The RDAP registrant is Japan Network Information Center (JPNIC), which is the standard registry for Japanese address space and aligns with the announcer's identity.
• The inventory consists of a single contiguous IPv4 block and one IPv6 prefix, typical of a dedicated academic allocation.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 133.80.0.0/16
• 2001:df0:456::/48

Upstream networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS2497 Internet Initiative Japan Inc.

Adjacent networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS2497 Internet Initiative Japan Inc.

Routing security

• RPKI: 0 valid, 0 invalid and 4 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 4 route objects.
• Listed in as-sets: AS-IIJ, AS-IIJ6, AS20965:AS-FROM-TEIN-TO-GEANT, AS2497:AS-IIJ, AS2497:AS-IIJ6.