AS131893 RICOH Company, Ltd.

RICOH-NET - RICOH Company, Ltd. · registered in Japan

IPv4 addresses5,63218 prefixes · <0.001% of announced IPv4

Rank in Japan#370largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#12,836of 79,396 networks with IPv4

IPv63 x /483 prefixes

CountryJapan745 ASNs registered there

Open AS131893 in ASN lookup Look up an IP in this network (133.139.18.1) All networks in Japan

IPv4 prefixes

All 18 prefixes, in address order.

133.139.18.0/23
133.139.20.0/23
133.139.25.0/24
133.139.34.0/24
133.139.44.0/23
133.139.55.0/24
133.139.70.0/23
133.139.72.0/24
133.139.74.0/24
133.139.77.0/24
133.139.88.0/24
133.139.94.0/24
133.139.109.0/24
133.139.114.0/24
133.139.241.0/24
133.139.242.0/24
133.139.248.0/24
210.173.216.0/24

IPv6 prefixes

All 3 prefixes.

2001:df0:467::/48
2001:df7:4808::/48
2001:df7:480a::/48

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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