AS131965 Xserver Inc.

XSERVER - Xserver Inc. · registered in Japan

IPv4 addresses165,12039 prefixes · 0.005% of announced IPv4

Rank in Japan#53largest network in JP by IPv4 space, of 724 · 0.10% of JP

Rank worldwide#1,234of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)9 prefixes

CountryJapan745 ASNs registered there

Open AS131965 in ASN lookup Look up an IP in this network (85.131.192.1) All networks in Japan

IPv4 prefixes

All 39 prefixes, in address order.

85.131.192.0/18
103.3.0.0/22
103.54.156.0/22
103.141.96.0/23
120.136.8.0/21
153.115.0.0/17
153.115.128.0/18
153.115.192.0/20
153.115.208.0/20
153.115.224.0/19
157.112.144.0/20
157.112.176.0/20
162.43.0.0/18
162.43.64.0/19
162.43.96.0/20
162.43.112.0/21
162.43.120.0/21
175.28.4.0/22
183.90.224.0/19
183.181.78.0/23
183.181.80.0/21
183.181.88.0/22
183.181.92.0/24
183.181.93.0/24
183.181.94.0/24
183.181.95.0/24
183.181.96.0/22
202.210.8.0/24
202.226.36.0/22
202.233.64.0/22
202.237.154.0/24
202.240.141.0/24
202.254.232.0/21
210.131.208.0/20
210.157.78.0/23
220.158.16.0/20
222.228.0.0/20
222.228.64.0/20
223.27.68.0/22

IPv6 prefixes

All 9 prefixes.

2400:b1a0::/39
2400:b1a0:200::/40
2400:b1a0:300::/40
2400:b1a0:400::/38
2400:b1a0:800::/37
2400:b1a0:1000::/36
2400:b1a0:2000::/35
2400:b1a0:4000::/34
2400:b1a0:8000::/33

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS17698#50 CCNET-NET - COMMUNITY NETWORK CENTER INCORPORATED.174,080

AS9374#51 EDION - EDION Corporation165,888

AS9614#52 OCT - JCOM Marketing Co.,Ltd.165,888

AS9997#54 MECHA - Suzuka Cable Co.,Ltd157,696

AS10006#55 SECOMTRUST - SECOM Trust Systems Co.,Ltd.146,176

AS18077#56 C-able - Yamaguchi Cable Vision Co.,Ltd135,680

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