Our Privacy Detection API detects various kinds of methods used to mask a user's true IP address, including VPN detection, proxy detection, tor usage, or a connection via a hosting provider, which could potentually be used to tunnel traffic, and mask the true IP address.

We perform custom full internet wide scans to detect almost 10 million active VPNs. This is combined with data on public SOCKS and HTTP proxies, tor exit nodes, and our own IP type detection to determine which IP ranges belong to hosting providers. The data is updated daily.

curl ipinfo.io/23.24.240.0/privacy?token=$TOKEN
{
  "vpn": true,
  "proxy": false,
  "tor": false,
  "hosting": false
}