AS23881 UDOMAIN-AS-AP
UDomain Web Hosting Company Ltd
Fraudex lists AS23881 as infrastructure that real customers rarely browse from: servers, VPN exits, proxies or bot networks. Every IP announced by this network comes back from /api/check with "is_bot": true.
Check an IP from AS23881
Look up any address in real time with the free IP checker, or from your own code:
curl "https://fraudex.xyz/api/check?ip=23.226.0.0" \ -H "X-API-Key: fx_your_key"
The answer includes the network (AS23881), the country and a VPN, proxy, Tor and bot verdict, in under a millisecond. Plans start at $40 for 30 days of unlimited lookups.
IPv4 ranges announced by AS23881
| First IP | Last IP | CIDR | Addresses |
|---|---|---|---|
| 23.226.0.0 | 23.226.4.255 | 23.226.0.0/22, 23.226.4.0/24 | 1,280 |
| 23.226.6.0 | 23.226.8.255 | 23.226.6.0/23, 23.226.8.0/24 | 768 |
| 23.226.11.0 | 23.226.11.255 | 23.226.11.0/24 | 256 |
| 45.121.192.0 | 45.121.192.255 | 45.121.192.0/24 | 256 |
| 45.121.194.0 | 45.121.194.255 | 45.121.194.0/24 | 256 |
| 45.121.196.0 | 45.121.201.255 | 45.121.196.0/22, 45.121.200.0/23 | 1,536 |
| 45.121.203.0 | 45.121.203.255 | 45.121.203.0/24 | 256 |
| 103.15.180.0 | 103.15.181.255 | 103.15.180.0/23 | 512 |
| 103.15.183.0 | 103.15.183.255 | 103.15.183.0/24 | 256 |
| 103.15.192.0 | 103.15.192.255 | 103.15.192.0/24 | 256 |
| 103.15.194.0 | 103.15.197.255 | 103.15.194.0/23, 103.15.196.0/23 | 1,024 |
| 103.15.199.0 | 103.15.199.255 | 103.15.199.0/24 | 256 |
| 103.19.25.0 | 103.19.27.255 | 103.19.25.0/24, 103.19.26.0/23 | 768 |
| 162.247.0.0 | 162.247.0.255 | 162.247.0.0/24 | 256 |
| 162.247.2.0 | 162.247.3.255 | 162.247.2.0/23 | 512 |
| 203.90.224.0 | 203.90.230.255 | 203.90.224.0/22, 203.90.228.0/23, 203.90.230.0/24 | 1,792 |
| 203.90.254.0 | 203.90.254.255 | 203.90.254.0/24 | 256 |
| 203.135.128.0 | 203.135.143.255 | 203.135.128.0/20 | 4,096 |
| 203.135.146.0 | 203.135.151.255 | 203.135.146.0/23, 203.135.148.0/22 | 1,536 |
| 203.135.153.0 | 203.135.159.255 | 203.135.153.0/24, 203.135.154.0/23, 203.135.156.0/22 | 1,792 |
IPv6 ranges announced by AS23881
| First IP | Last IP | CIDR |
|---|---|---|
| 2400:c300:: | 2400:c300:1:ffff:ffff:ffff:ffff:ffff | 2400:c300::/47 |
Questions about AS23881
Is AS23881 a VPN or hosting network?
Yes. Fraudex lists AS23881 (UDOMAIN-AS-AP) among the hosting, VPN, proxy and bot networks it flags, so visitors from it are usually servers or people hiding their real location rather than ordinary customers.
Which country is AS23881 registered in?
AS23881 is registered in Hong Kong. Individual addresses can be used elsewhere, so check the IP itself when location matters.
How many IP addresses does AS23881 have?
It announces 20 IPv4 ranges with 17,920 addresses in total, plus 1 IPv6 range.
How do I block traffic from AS23881?
Blocking a whole network by number goes stale as ranges change hands. It is more reliable to check each visitor's IP when they sign up, log in or pay: the Fraudex API returns the network and a VPN and bot verdict, so you can block, challenge or just log flagged traffic. See why an IP blocking API pays for itself.