AS131903 Nomura Research Institute,Ltd.

NRI-IVPN - Nomura Research Institute,Ltd. · registered in Japan

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in Japan#705largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#69,940of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryJapan745 ASNs registered there

Open AS131903 in ASN lookup Look up an IP in this network (103.59.89.1) All networks in Japan

IPv4 prefixes

All 1 prefix, in address order.

103.59.89.0/24

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS55949#702 TECHNOPROHOLDINGS-JP - Technopro Holdings256

AS59124#703 KYOTO-PREF - KYOTO Prefectural Government256

AS131894#704 U-Cloud-2 - UNIADEX, LTD.256

AS131913#706 AS131913-9 - JPNIC-4Byte-ASBLOCK-AP256

AS131989#707 PFU-UMC-MS01 - PFU LIMITED256

AS132211#708 FXCM-ASIA-AP - FX Corporate LLC256

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