AS55390 Tokyo University of Science

TUSNET - Tokyo University of Science · registered in Japan

IPv4 addresses65,5361 prefixes · 0.002% of announced IPv4

Rank in Japan#125largest network in JP by IPv4 space, of 724 · 0.04% of JP

Rank worldwide#3,005of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryJapan745 ASNs registered there

Open AS55390 in ASN lookup Look up an IP in this network (133.31.0.1) All networks in Japan

IPv4 prefixes

All 1 prefix, in address order.

133.31.0.0/16

IPv6 prefixes

All 1 prefix.

2001:df0:cf::/48

Similar-sized networks in Japan

ASNNameIPv4 addresses

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

AS55904#126 KOGAKUIN-AS - KOGAKUIN University65,536

AS58785#127 TGU-NET - Tohoku Gakuin University65,536

AS131159#128 AS-YAMAGATAU - Yamagata 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