AS55904 KOGAKUIN University

KOGAKUIN-AS - KOGAKUIN University · registered in Japan

IPv4 addresses65,5361 prefixes · 0.002% of announced IPv4

Rank in Japan#126largest network in JP by IPv4 space, of 724 · 0.04% of JP

Rank worldwide#3,006of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryJapan745 ASNs registered there

Open AS55904 in ASN lookup Look up an IP in this network (133.80.0.1) All networks in Japan

IPv4 prefixes

All 1 prefix, in address order.

133.80.0.0/16

IPv6 prefixes

All 1 prefix.

2001:df0:456::/48

Similar-sized networks in Japan

ASNNameIPv4 addresses

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AS131159#128 AS-YAMAGATAU - Yamagata University65,536

AS2508#129 kyushu-u - Kyushu University65,536

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