AS59094 esu2 Corporation

S2-NET - esu2 Corporation · registered in Japan

IPv4 addresses6,1446 prefixes · <0.001% of announced IPv4

Rank in Japan#366largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#12,489of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryJapan745 ASNs registered there

Open AS59094 in ASN lookup Look up an IP in this network (103.37.108.1) All networks in Japan

IPv4 prefixes

All 6 prefixes, in address order.

103.37.108.0/22
103.37.112.0/22
103.55.12.0/22
103.55.192.0/22
103.231.192.0/22
103.236.144.0/22

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS18264#363 SEN - Seikei Eizo Network Inc.6,144

AS23613#364 NMTNET - New Media Tokushima Co.,ltd.6,144

AS58788#365 CHIRORO - Chiroro-Net Co.,Ltd.6,144

AS131896#367 SSI-Lab - SSI Lab Inc.6,144

AS137445#368 AS-PFLINK-JP - PF LINK SYSTEMS5,888

AS139468#369 DCI-AS-AP - DC Communications Inc.5,632

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