AS17529 STARCAT Co .,LTD.

MediaCat - STARCAT Co .,LTD. · registered in Japan

IPv4 addresses135,42412 prefixes · 0.004% of announced IPv4

Rank in Japan#57largest network in JP by IPv4 space, of 724 · 0.08% of JP

Rank worldwide#1,443of 79,396 networks with IPv4

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

CountryJapan745 ASNs registered there

Open AS17529 in ASN lookup Look up an IP in this network (58.146.0.1) All networks in Japan

IPv4 prefixes

All 12 prefixes, in address order.

58.146.0.0/18
58.146.64.0/19
61.211.128.0/20
61.213.192.0/20
120.138.128.0/18
124.241.128.0/18
125.58.64.0/18
180.200.0.0/17
193.115.32.0/19
203.91.160.0/19
211.128.16.0/20
219.100.227.0/24

IPv6 prefixes

All 1 prefix.

2001:3b0::/32

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AS7670#58 CTNET - Enecom,Inc.134,656

AS2504#59 NCA5 - Kyoto University132,096

AS37917#60 UTINS - University of Tsukuba132,096

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