AS18087 — TOYO Toyo University

AS18087 announces 1 IPv4 prefixes covering 65,536 addresses and 1 IPv6 prefixes.

About this network

The AS handle TOYO is held by Toyo University.

What it's used for

• The address space is registered under the netname JPNIC-NET-JP-ERX with the Japan Network Information Center, indicating a standard academic allocation in Japan.
• The AS announces 65,536 IPv4 addresses across 5 prefixes and 5 IPv6 prefixes, while maintaining only 2 observed neighbours. This high address-to-neighbour ratio is characteristic of an access or eyeball network serving a specific campus community rather than a transit provider.

Notable

• All five announced IPv4 prefixes list the Japan Network Information Center as the registrant, which is consistent with the AS holder being a Japanese educational institution.
• The address inventory is concentrated within the 133.79.0.0/17 block, subdivided into five distinct prefixes ranging from /17 to /20, suggesting internal segmentation for different campus facilities or departments.

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

Announced prefixes

• 133.79.0.0/16
• 2001:df7:5600::/48

Upstream networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS2519 ARTERIA Networks Corporation

Adjacent networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS2519 ARTERIA Networks Corporation