AS2501 — UTNET The University of Tokyo

Network type: education

AS2501 announces 4 IPv4 prefixes covering 200,704 addresses and 1 IPv6 prefixes.

About this network

UTNET is the campus network of the University of Tokyo (Todai), Japan's oldest and most prominent national university.

What it's used for

• Campus, research, and administrative networking across the university's Tokyo campuses.

Notable

• An institutional research-university network, not a commercial ISP or host. The low AS number reflects an early Japanese-internet allocation from the 1990s.

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

Announced prefixes

• 130.69.0.0/16
• 133.11.0.0/16
• 157.82.0.0/16
• 192.51.208.0/20
• 2404:d540::/32

Upstream networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS2500 WIDE Project

Adjacent networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS2500 WIDE Project