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UTNET The University of Tokyo
AS2501
Other
200.7K
IP addresses
4
IPv4
2
IPv6
Download IP Ranges
IPv4 Prefix List (4)
157.82.0.0/16
192.51.208.0/20
130.69.0.0/16
133.11.0.0/16
157.82.0.0/16
192.51.208.0/20
130.69.0.0/16
133.11.0.0/16
IPv6 Prefix List (2)
2404:d540:1::/48
2404:d540::/32
2404:d540:1::/48
2404:d540::/32
Overview
ASN Numbers
AS2501
Total Prefixes
6
Last Updated
09.12.2025
Use Cases
Firewall Configuration
Allow or block traffic from this provider's IP ranges
Security Analysis
Identify traffic sources and validate connections
Network Monitoring
Track and analyze traffic patterns by provider
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