AS23881 UDomain Web Hosting Company Limited

A network in Hong Kong SAR China. Here are the size of its IP ranges and the data used for visitor checks.

Country

IPv4 addresses

18,176 addresses

IPv4 ranges

IPv6 ranges

Visitor check data

Visitors from IPs in this network are more likely to be servers, VPNs or proxies than people on home or mobile lines. How checks work

Up to 20, largest first.

203.135.128.0/20

203.90.224.0 ~ 203.90.230.255

203.135.153.0 ~ 203.135.159.255

45.121.196.0 ~ 45.121.201.255

203.135.146.0 ~ 203.135.151.255

23.226.0.0 ~ 23.226.4.255

103.15.194.0 ~ 103.15.197.255

23.226.6.0 ~ 23.226.8.255

45.121.192.0 ~ 45.121.194.255

103.19.25.0 ~ 103.19.27.255

103.15.180.0/23

162.247.2.0/23

23.226.11.0/24

45.121.203.0/24

103.15.183.0/24

103.15.192.0/24

103.15.199.0/24

162.247.0.0/24

203.90.254.0/24

Data: DB-IP (CC BY 4.0), public VPN server list, Tor Project exit list · as of 2026-10-13