AS131923 MCAT Ltd.

MCAT - MCAT Ltd. · registered in Japan

IPv4 addresses22,52810 prefixes · <0.001% of announced IPv4

Rank in Japan#234largest network in JP by IPv4 space, of 724 · 0.01% of JP

Rank worldwide#5,754of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryJapan745 ASNs registered there

Open AS131923 in ASN lookup Look up an IP in this network (103.95.104.1) All networks in Japan

IPv4 prefixes

All 10 prefixes, in address order.

103.95.104.0/22
120.50.192.0/20
133.88.87.0/24
133.88.88.0/22
133.88.92.0/23
133.88.94.0/24
133.247.136.0/21
133.247.240.0/20
218.45.64.0/19
219.100.156.0/22

IPv6 prefixes

All 1 prefix.

2401:5ac0::/32

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS18121#231 INCL - Ishikawa Computer Center Co.,LTD.22,528

AS23778#232 CANET - IMIZU CABLE NETWORK CO.,LTD.22,528

AS23786#233 MABLE - San-in Cable Vision CO.,LTD22,528

AS18094#235 TCN-AS - Tokyo Cable Network.,INC22,016

AS7505#236 MEDIAWEB - Fujitsu Systems Applications & Support Limited21,504

AS17958#237 KCV - Kasaoka Cable Vision Co,LTD.21,504

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