AS131909 OCC Co., Ltd.

Okinawa-DC - OCC Co., Ltd. · registered in Japan

IPv4 addresses2,0481 prefixes · <0.001% of announced IPv4

Rank in Japan#475largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#23,911of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryJapan745 ASNs registered there

Open AS131909 in ASN lookup Look up an IP in this network (203.99.72.1) All networks in Japan

IPv4 prefixes

All 1 prefix, in address order.

203.99.72.0/21

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AS150358#478 TWCU-NET - Tokyo Woman's Christian University2,048

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