AS2505 High Energy Accelerator Research Organization, KEK

HEPNET-J - High Energy Accelerator Research Organization, KEK · registered in Japan

IPv4 addresses74,2404 prefixes · 0.002% of announced IPv4

Rank in Japan#88largest network in JP by IPv4 space, of 724 · 0.05% of JP

Rank worldwide#2,321of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryJapan745 ASNs registered there

Open AS2505 in ASN lookup Look up an IP in this network (130.87.0.1) All networks in Japan

IPv4 prefixes

All 4 prefixes, in address order.

130.87.0.0/16
192.153.112.0/24
192.153.114.0/24
202.13.192.0/19

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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