AS23781 — TOYAMA-AN-AS Toyama University

AS23781 announces 4 IPv4 prefixes covering 72,704 addresses and 0 IPv6 prefixes.

About this network

TOYAMA-AN-AS is operated by Toyama University.

What it's used for

• The address space carries university network traffic, evidenced by reverse DNS entries pointing to TMPU-net.u-toyama.ac.jp and netnames such as TYA-NET and TYA-NET-CIDR-BLK-JP.
• The AS announces 72,704 IPv4 addresses across 4 prefixes with only 1 observed neighbour, a ratio characteristic of an access or eyeball network serving a single institution rather than a transit provider.

Notable

• Registrants for all announced prefixes are listed as Japan Network Information Center or IRT-JPNIC-JP, which aligns with the announcer being a Japanese academic institution.
• The inventory consists of one large /16 block and three smaller blocks (/20, /21, /22), all located in Japan.

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

Announced prefixes

• 160.26.0.0/16
• 202.240.244.0/22
• 202.251.144.0/20
• 202.254.200.0/21

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