AS131159

Summary

Country	Japan
Organization	Yamagata University
Domain	yamagata-u.ac.jp
Number of IPv4	123,648
Number of IPv6	1.2089× 1024
AS Type	Education
Registry	JPNIC
Allocated	January 01, 1970 (about 56 years ago)
Updated	November 01, 2011 (about 14 years ago)

IP Ranges

AS131159 announces 7 IPv4 ranges and 1 IPv6 range.

That's a total of 123,648 IPv4 addresses and 1.2089× 10²⁴ IPv6 addresses.

Prefix	Organization	Size	Registry	Status
133.24.0.0/18	Japan Network Information Center	16,384	APNIC	ALLOCATED PORTABLE
133.24.0.0/16	Japan Network Information Center	65,536	APNIC	ALLOCATED PORTABLE
133.24.64.0/18	Japan Network Information Center	16,384	APNIC	ALLOCATED PORTABLE
133.24.128.0/18	Japan Network Information Center	16,384	APNIC	ALLOCATED PORTABLE
133.24.192.0/19	Japan Network Information Center	8,192	APNIC	ALLOCATED PORTABLE
133.24.248.0/23	Japan Network Information Center	512	APNIC	ALLOCATED PORTABLE
133.24.248.0/24	Japan Network Information Center	256	APNIC	ALLOCATED PORTABLE

Prefix	Organization	Size	Registry	Status
2001:df0:25e::/48	Yamagata University	1.2089× 1024	JPNIC

Peers

AS131159 actively fosters the following peering relationships that enhance network performance through direct, settlement-free traffic exchange. Even with a modest number of peers, each connection serves as a strategic asset—optimizing routing, reducing latency, and minimizing transit costs.

Upstreams

AS131159 connects to the global Internet via at least 2 upstream providers. In this setup, AS131159 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.

Downstreams

AS131159 currently has no downstream networks, meaning it does not serve as a transit provider to customer networks.