AS18143 Mitsubishi Research Institute DCS Co.,Ltd.

DCSNET - Mitsubishi Research Institute DCS Co.,Ltd. · registered in Japan

IPv4 addresses4,0961 prefixes · <0.001% of announced IPv4

Rank in Japan#404largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#15,730of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryJapan745 ASNs registered there

Open AS18143 in ASN lookup Look up an IP in this network (202.254.32.1) All networks in Japan

IPv4 prefixes

All 1 prefix, in address order.

202.254.32.0/20

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ASNNameIPv4 addresses

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AS23795#407 FURUKAWA - Fitec Corp.4,096

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