AS23780 CTB Media Inc.

CTB - CTB Media Inc. · registered in Japan

IPv4 addresses16,3845 prefixes · <0.001% of announced IPv4

Rank in Japan#272largest network in JP by IPv4 space, of 724 · 0.01% of JP

Rank worldwide#6,902of 79,396 networks with IPv4

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

CountryJapan745 ASNs registered there

Open AS23780 in ASN lookup Look up an IP in this network (49.128.24.1) All networks in Japan

IPv4 prefixes

All 5 prefixes, in address order.

49.128.24.0/21
49.128.96.0/22
203.201.52.0/22
211.15.112.0/20
211.19.224.0/19

IPv6 prefixes

All 1 prefix.

2402:6c80::/32

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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