AS18124 Okayama University of Science

OUS-NET - Okayama University of Science · registered in Japan

IPv4 addresses65,5366 prefixes · 0.002% of announced IPv4

Rank in Japan#122largest network in JP by IPv4 space, of 724 · 0.04% of JP

Rank worldwide#2,984of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryJapan745 ASNs registered there

Open AS18124 in ASN lookup Look up an IP in this network (150.55.0.1) All networks in Japan

IPv4 prefixes

All 6 prefixes, in address order.

150.55.0.0/17
150.55.128.0/21
150.55.136.0/21
150.55.144.0/20
150.55.160.0/19
150.55.192.0/18

IPv6 prefixes

All 1 prefix.

2001:df0:3d80::/48

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS17523#119 AOYAMA - Aoyama Gakuin University65,536

AS17701#120 SEINAN - Seinan Gakuin University65,536

AS18087#121 TOYO - Toyo University65,536

AS37919#123 SEGASAMMY - SEGA SAMMY HOLDINGS INC.65,536

AS55379#124 hosei-net - Hosei University65,536

AS55390#125 TUSNET - Tokyo University of Science65,536

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