AS18267 — DOSHISHA Doshisha University

AS18267 announces 2 IPv4 prefixes covering 20,480 addresses and 1 IPv6 prefixes.

About this network

The AS handle DOSHISHA is operated by Doshisha University.

What it's used for

• The address space is registered under the netname DONET-CIDR-BLK-JP with the Japan Network Information Center, indicating it is part of the Japanese academic and research network infrastructure.
• The AS announces 20,480 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, while maintaining only 1 observed neighbour, a ratio characteristic of an isolated educational or institutional network rather than a transit provider.

Notable

• The registrants for both announced IPv4 prefixes are listed as the Japan Network Information Center, which is consistent with the holder being a Japanese educational institution.
• The inventory consists of two distinct IPv4 blocks, 202.23.128.0/18 and 202.11.192.0/20, alongside a single IPv6 prefix, 2001:df7:a800::/48.

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

Announced prefixes

• 202.11.192.0/20
• 202.23.128.0/18
• 2001:df7:a800::/48

Upstream networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics

Adjacent networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics

Routing security

• RPKI: 0 valid, 0 invalid and 3 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 67% of announcements registered; 2 route objects.
• Listed in as-sets: AS-IIJ, AS-IIJ6, AS-OCN, AS-OCN, AS-OCN-V6, AS-OCN-V6, AS-WIDE, AS20965:AS-FROM-TEIN-TO-GEANT, AS2497:AS-IIJ, AS2497:AS-IIJ6.