AS24287 National Institute of Informatics

TEIN2-JP - National Institute of Informatics · registered in Japan

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in Japan#657largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#61,132of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryJapan745 ASNs registered there

Open AS24287 in ASN lookup Look up an IP in this network (192.50.12.1) All networks in Japan

IPv4 prefixes

All 1 prefix, in address order.

192.50.12.0/24

IPv6 prefixes

All 1 prefix.

2001:df0:46::/48

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AS45674#660 MIDORI - BIGLOBE Inc.256

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