AS37891 JR TOKAI Information Systems Company

JTIS - JR TOKAI Information Systems Company · registered in Japan

IPv4 addresses2,5603 prefixes · <0.001% of announced IPv4

Rank in Japan#438largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#20,138of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryJapan745 ASNs registered there

Open AS37891 in ASN lookup Look up an IP in this network (58.147.160.1) All networks in Japan

IPv4 prefixes

All 3 prefixes, in address order.

58.147.160.0/21
192.218.65.0/24
192.218.66.0/24

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS55898#435 YAHOO-CORP - LY Corporation2,560

AS59103#436 SOFTETHER - SoftEther Corporation2,560

AS23632#437 TVT-NET - TVT Tsuyama Co.,Ltd.2,560

AS58653#439 VolvoITJapan - UD Trucks Corporation, Volvo Information Technology Japan2,560

AS58789#440 DUNAMIS - DUNAMIS Co.,Ltd2,560

AS63779#441 JUSTPLAYER - InfiniCloud Co. Ltd.2,560

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