AS18087 Toyo University

TOYO - Toyo University · registered in Japan

IPv4 addresses65,5365 prefixes · 0.002% of announced IPv4

Rank in Japan#121largest network in JP by IPv4 space, of 724 · 0.04% of JP

Rank worldwide#2,983of 79,396 networks with IPv4

IPv61 x /485 prefixes

CountryJapan745 ASNs registered there

Open AS18087 in ASN lookup Look up an IP in this network (133.79.0.1) All networks in Japan

IPv4 prefixes

All 5 prefixes, in address order.

133.79.0.0/17
133.79.128.0/18
133.79.192.0/20
133.79.208.0/20
133.79.224.0/19

IPv6 prefixes

All 5 prefixes.

2001:df7:5600::/49
2001:df7:5600:8000::/52
2001:df7:5600:9000::/52
2001:df7:5600:a000::/51
2001:df7:5600:c000::/50

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS10014#118 NIHON-U - Nihon University65,536

AS17523#119 AOYAMA - Aoyama Gakuin University65,536

AS17701#120 SEINAN - Seinan Gakuin University65,536

AS18124#122 OUS-NET - Okayama University of Science65,536

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

AS55379#124 hosei-net - Hosei University65,536

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