AS139472 Catalina Marketing Japan K.K.

CMJK-AS-AP - Catalina Marketing Japan K.K. · registered in Japan

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in Japan#681largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#61,691of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryJapan745 ASNs registered there

Open AS139472 in ASN lookup Look up an IP in this network (198.204.78.1) All networks in Japan

IPv4 prefixes

All 1 prefix, in address order.

198.204.78.0/24

IPv6 prefixes

All 1 prefix.

2001:df6:d7c0::/48

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS132610#678 JPNIC-NET-JP - Japan Network Information Center256

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AS133780#680 QMC-AS-AP - Quantum Mesh Co.,Ltd.256

AS146972#682 TEC-JP-NET - TOYO Engineering Corporation256

AS146980#683 IOC - Tokyo Metropolitan College of Industrial Technology Infomation System Engineering Course256

AS150357#684 SUN-SECBASE - University of Nagasaki256

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