How proxy and VPN detection works
We compare the IP address against several continuously updated data sets: the official list of Tor exit nodes, public lists of commercial VPN ranges, the published address ranges of major clouds (AWS, Google Cloud, Oracle, Cloudflare, DigitalOcean, Linode) and the network owner's name from the ASN database.
Each signal adds to a risk score from 0 to 100. Tor exit nodes score highest, followed by known VPN ranges, then data-center and hosting networks. Ordinary home broadband and mobile networks score low.
Why it matters
Fraud teams, game servers, streaming services and ad networks use IP reputation to spot automated traffic and account abuse. Privacy-conscious users use the same check to confirm their VPN or proxy is actually in use.
よくある質問
Can a residential proxy be detected?
Residential proxies route through real home connections, so IP-based checks alone usually classify them as residential. Behavioural signals are needed to detect them.
Why is my home IP flagged as a data center?
Some ISPs register their networks under a hosting-style name, or your IP was recently reassigned from a server range. Lists update every few hours.
Is this data available via API?
Yes. Pro and Business API plans include the risk object (Tor, VPN, data-center flags and score) in every response.