AS23820 Rakuten Group, Inc.

RAKUTEN - Rakuten Group, Inc. · registered in Japan

IPv4 addresses69,63210 prefixes · 0.002% of announced IPv4

Rank in Japan#95largest network in JP by IPv4 space, of 724 · 0.04% of JP

Rank worldwide#2,446of 79,396 networks with IPv4

IPv61 x /32 (69,632 x /48)12 prefixes

CountryJapan745 ASNs registered there

Open AS23820 in ASN lookup Look up an IP in this network (133.237.0.1) All networks in Japan

IPv4 prefixes

All 10 prefixes, in address order.

133.237.0.0/17
133.237.128.0/18
133.237.192.0/19
133.237.224.0/20
133.237.240.0/21
133.237.248.0/24
133.237.249.0/24
133.237.250.0/23
133.237.252.0/22
202.72.48.0/20

IPv6 prefixes

All 12 prefixes.

2403:400::/38
2403:400:400::/39
2403:400:600::/39
2403:400:800::/40
2403:400:900::/40
2403:400:a00::/39
2403:400:c00::/38
2403:400:1000::/36
2403:400:2000::/35
2403:400:4000::/34
2403:400:8000::/33
2403:401::/36

Other ASNs named Rakuten Group, Inc.

1 other network uses the same organisation name; together with AS23820 they announce 71,424 IPv4 addresses.

ASNNameIPv4 addresses

AS131914DD-NET - Rakuten Group, Inc. JP1,792

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS17939#92 MCN-NET01 - miyazaki cabletelevision network Co.,LTD71,680

AS9615#93 TEES - TOYOHASHI CABLE NETWORK INC.71,680

AS7502#94 IP-KYOTO - Advanced Software Technology & Management Research Institute of KYOTO70,144

AS17947#96 S-UTOPIA - SAKURA KCS Corporation.69,632

AS18271#97 EVOnet - Sojitz Tech Innovation Co., Ltd.69,632

AS37918#98 ECL-INET - NTT, Inc.69,376

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