AS17509 STARNET Co.,Ltd.

STARNET - STARNET Co.,Ltd. · registered in Japan

IPv4 addresses6,1442 prefixes · <0.001% of announced IPv4

Rank in Japan#353largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#12,167of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)15 prefixes

CountryJapan745 ASNs registered there

Open AS17509 in ASN lookup Look up an IP in this network (202.15.32.1) All networks in Japan

IPv4 prefixes

All 2 prefixes, in address order.

202.15.32.0/21
203.140.192.0/20

IPv6 prefixes

All 15 prefixes.

2404:3200::/46
2404:3200:4::/46
2404:3200:8::/45
2404:3200:10::/44
2404:3200:20::/43
2404:3200:40::/42
2404:3200:80::/41
2404:3200:100::/40
2404:3200:200::/39
2404:3200:400::/38
2404:3200:800::/37
2404:3200:1000::/36
2404:3200:2000::/35
2404:3200:4000::/34
2404:3200:8000::/33

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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