IPv4 addresses1,0241 prefixes · <0.001% of announced IPv4
Rank in Japan#523largest network in JP by IPv4 space, of 724 · <0.01% of JP
Rank worldwide#30,464of 79,396 networks with IPv4
IPv61 x /32 (65,536 x /48)1 prefixes
CountryJapan745 ASNs registered there
IPv4 prefixes
All 1 prefix, in address order.
IPv6 prefixes
All 1 prefix.
Similar-sized networks in Japan
ASNNameIPv4 addresses
AS7500#520 M-ROOT-DNS - WIDE Project1,024
AS38648#521 F-REGI - F-REGI Co.,Ltd.1,024
AS58645#522 marinet - Miyagi Cable TV Co.,Ltd1,024
AS63793#524 OPSBETTER - Japan OPS Better Co., Ltd.1,024
AS131160#525 WI2 - Wire and Wireless Co.,Ltd.1,024
AS131905#526 JPRS-GTLD - Japan Registry Services Co., Ltd.1,024
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