Autonomous System

AS131965 Xserver Inc.

HostingActiveJapanJPNIC

AS131965 (XSERVER) is a hosting network operated by Xserver Inc. in Japan, registered with JPNIC. It has 60 IPv4 prefixes with 217,856 addresses and 2 IPv6 prefixes, which makes it the 1,211th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses217,856in 60 prefixes
IPv6 prefixes2≈ 8.0 × 10²⁸ addresses
Size rank#1,211of 82,200 active ASNs
Abuser scoreLow0.11% of its addresses flagged · method

Details

OrganizationXserver Inc. · hosting provider profile
AS nameXSERVER
Websitexserver.co.jp
Country Japan (JP)
Network typeHosting
RegistryJPNIC
Abuse contacthostmaster@idnic.net
Registered—
Last updated2026-03-10

IPv4 prefixes

60 prefixes · 217,856 addresses
NetworkAddressesFirst – last address
153.115.0.0/1665,536153.115.0.0 – 153.115.255.255
162.43.0.0/1732,768162.43.0.0 – 162.43.127.255
85.131.192.0/1816,38485.131.192.0 – 85.131.255.255
153.115.0.0/1816,384153.115.0.0 – 153.115.63.255
183.90.224.0/198,192183.90.224.0 – 183.90.255.255
153.115.192.0/204,096153.115.192.0 – 153.115.207.255
157.112.144.0/204,096157.112.144.0 – 157.112.159.255
157.112.176.0/204,096157.112.176.0 – 157.112.191.255
183.90.224.0/204,096183.90.224.0 – 183.90.239.255
183.90.240.0/204,096183.90.240.0 – 183.90.255.255
183.181.80.0/204,096183.181.80.0 – 183.181.95.255
210.131.208.0/204,096210.131.208.0 – 210.131.223.255
220.158.16.0/204,096220.158.16.0 – 220.158.31.255
222.228.0.0/204,096222.228.0.0 – 222.228.15.255
222.228.64.0/204,096222.228.64.0 – 222.228.79.255
120.136.8.0/212,048120.136.8.0 – 120.136.15.255
157.112.144.0/212,048157.112.144.0 – 157.112.151.255
157.112.152.0/212,048157.112.152.0 – 157.112.159.255
157.112.176.0/212,048157.112.176.0 – 157.112.183.255
157.112.184.0/212,048157.112.184.0 – 157.112.191.255
162.43.112.0/212,048162.43.112.0 – 162.43.119.255
202.254.232.0/212,048202.254.232.0 – 202.254.239.255
103.3.0.0/221,024103.3.0.0 – 103.3.3.255
103.54.156.0/221,024103.54.156.0 – 103.54.159.255
120.136.8.0/221,024120.136.8.0 – 120.136.11.255
The 25 largest of 60. The API and the database have all of them.

IPv6 prefixes

2 prefixes
  • 2400:b1a0::/32
  • 2400:b1a0:200::/40

Query AS131965 with the API

The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day. 

curl "https://api.ipapi.is/?q=AS131965&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS131965, with or without a key:

curl "https://api.ipapi.is/?q=153.115.0.1"

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