AS23616 Hitachi Systems, Ltd.

HNB - Hitachi Systems, Ltd. · registered in Japan

IPv4 addresses3,0723 prefixes · <0.001% of announced IPv4

Rank in Japan#426largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#18,031of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryJapan745 ASNs registered there

Open AS23616 in ASN lookup Look up an IP in this network (27.121.92.1) All networks in Japan

IPv4 prefixes

All 3 prefixes, in address order.

27.121.92.0/22
202.176.8.0/22
203.81.12.0/22

IPv6 prefixes

All 1 prefix.

2406:fe00::/32

Other ASNs named Hitachi Systems, Ltd.

2 other networks use the same organisation name; together with AS23616 they announce 6,656 IPv4 addresses.

ASNNameIPv4 addresses

AS7513SHIELD - Hitachi Systems, Ltd. JP2,048

AS24280HIS-TKIDC - Hitachi Systems, Ltd. JP1,536

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS151374#423 IWK-WORKS - IX-layers, Inc.3,328

AS2515#424 JPNIC - Japan Network Information Center3,072

AS17934#425 JGNv6 - National Institute of Information and Communications Technology3,072

AS59123#427 KAKAKUCOM - Kakaku.com, Inc.3,072

AS151195#428 NGIKK-AS-AP - Nova Global ICT Kabushiki Kaisha3,072

AS59093#429 ICKNET - IMABARI CATV CORPORATION3,072

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