IPv4 addresses4,0961 prefixes · <0.001% of announced IPv4
Rank in Japan#390largest network in JP by IPv4 space, of 724 · <0.01% of JP
Rank worldwide#15,019of 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
AS37914#387 Univnet - Advanced Software Technology and Management Research Institute of KYOTO4,352
AS55897#388 SAKURA-F - SAKURA Internet Inc.4,352
AS18259#389 HIGE - NTT DOCOMO BUSINESS, Inc4,096
AS23836#391 RELNET - RELATION Co., Ltd.4,096
AS24477#392 NETAPPAS - NetApp, Inc.4,096
AS38633#393 VCIU-NET-AS - Value Core Inc.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