AS17516 NTT COMWARE CORPORATION

NTTCOMWARE - NTT COMWARE CORPORATION · registered in Japan

IPv4 addresses19,45616 prefixes · <0.001% of announced IPv4

Rank in Japan#253largest network in JP by IPv4 space, of 724 · 0.01% of JP

Rank worldwide#6,235of 79,396 networks with IPv4

IPv632,769 x /482 prefixes

CountryJapan745 ASNs registered there

Open AS17516 in ASN lookup Look up an IP in this network (132.222.121.1) All networks in Japan

IPv4 prefixes

All 16 prefixes, in address order.

132.222.121.0/24
132.222.160.0/24
132.222.192.0/23
132.222.224.0/24
163.137.128.0/19
163.137.188.0/24
163.137.194.0/23
163.137.196.0/23
163.137.200.0/21
163.137.208.0/23
163.137.212.0/22
163.137.216.0/22
163.137.220.0/23
163.137.224.0/22
163.137.230.0/23
163.137.232.0/21

IPv6 prefixes

All 2 prefixes.

2403:2d00:3::/48
2403:2d00:8000::/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