AS215871 XTOM-JP xTom Japan Corporation

XTOM-JP xTom Japan Corporation · registered in Japan

IPv4 addresses5121 prefixes · <0.001% of announced IPv4

Rank in Japan#578largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#46,227of 79,396 networks with IPv4

IPv68 x /32 (524,800 x /48)2 prefixes

CountryJapan745 ASNs registered there

Open AS215871 in ASN lookup Look up an IP in this network (163.128.26.1) All networks in Japan

IPv4 prefixes

All 1 prefix, in address order.

163.128.26.0/23

IPv6 prefixes

All 2 prefixes.

2402:5120::/39
2a14:1f80::/29

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AS7257#579 MARU-NET OTO GK512

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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