AS131900 Directorz Co.,Ltd.

DIRECTORZ - Directorz Co.,Ltd. · registered in Japan

IPv4 addresses1,2804 prefixes · <0.001% of announced IPv4

Rank in Japan#509largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#28,245of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryJapan745 ASNs registered there

Open AS131900 in ASN lookup Look up an IP in this network (27.133.225.1) All networks in Japan

IPv4 prefixes

All 4 prefixes, in address order.

27.133.225.0/24
27.133.226.0/23
153.124.200.0/24
182.161.76.0/24

IPv6 prefixes

All 1 prefix.

2402:9300::/48

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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