AS131159 Yamagata University

AS-YAMAGATAU - Yamagata University · registered in Japan

IPv4 addresses65,5368 prefixes · 0.002% of announced IPv4

Rank in Japan#128largest network in JP by IPv4 space, of 724 · 0.04% of JP

Rank worldwide#3,008of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryJapan745 ASNs registered there

Open AS131159 in ASN lookup Look up an IP in this network (133.24.0.1) All networks in Japan

IPv4 prefixes

All 8 prefixes, in address order.

133.24.0.0/17
133.24.128.0/18
133.24.192.0/19
133.24.224.0/20
133.24.240.0/21
133.24.248.0/23
133.24.250.0/23
133.24.252.0/22

IPv6 prefixes

All 1 prefix.

2001:df0:25e::/48

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AS2513#130 JST - Japan Science and Technology Agency65,536

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IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources