AS55899 irob Ltd.

IROB - irob Ltd. · registered in Japan

IPv4 addresses8,7044 prefixes · <0.001% of announced IPv4

Rank in Japan#315largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#9,852of 79,396 networks with IPv4

IPv62 x /32 (131,072 x /48)2 prefixes

CountryJapan745 ASNs registered there

Open AS55899 in ASN lookup Look up an IP in this network (103.171.16.1) All networks in Japan

IPv4 prefixes

All 4 prefixes, in address order.

103.171.16.0/23
183.182.32.0/20
183.182.48.0/21
183.182.56.0/21

IPv6 prefixes

All 2 prefixes.

2401:2540::/32
2407:bc40::/32

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AS37908#316 KBC - KIBI Cable Television Co.,Ltd.8,704

AS45687#317 MCT-Internet - Minamikyusyu CableTV Net Inc.8,704

AS131970#318 Hikarinet - Hikarinet Inc.8,704

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