VPN & Proxy Detection — United KingdomDetect VPN, Proxy & Bot Traffic from United Kingdom
Sentinel scores every visitor's network in real time — flagging VPN exit nodes, residential proxies, datacenter ASNs, and headless browsers originating from the United Kingdom. Free API. Under 40ms. No CAPTCHAs.
Why United Kingdom traffic needs special scrutiny
Datacenter ASN concentration
United Kingdom is one of the highest VPN penetration rates in Europe, with M247, Datacamp, and Hostpalace ranges driving most VPN traffic.
Residential proxy resale
Consumer ISP ranges in United Kingdom are routinely sold through residential proxy networks like ShadowNode and Bright Data. These IPs look real but rotate every few minutes — a clear bot signature once you know what to look for.
VPN exit-node clustering
The same handful of hosting providers dominate VPN exit nodes in United Kingdom. Sentinel maintains live mappings of these ranges so a new IP from a known VPN ASN is flagged within seconds of going live.
Antidetect browser usage
Multi-accounting fraud against UK-targeted SaaS, fintech, and e-commerce increasingly uses Kameleo, GoLogin, or AdsPower to spoof device fingerprints. Sentinel scores these at the device layer, not the IP layer.
What Sentinel detects for United Kingdom traffic
- Every major VPN provider's UK exit nodes (NordVPN, ExpressVPN, ProtonVPN, Mullvad, Surfshark, and 40+ more)
- Residential proxy networks reselling consumer UK IPs (ShadowNode, Bright Data, Smartproxy, Oxylabs)
- Datacenter ASNs commonly used for automation (AWS, GCP, Azure, OVH, Hetzner, DigitalOcean, Vultr, Linode)
- Tor exit nodes and known anonymous relays advertising UK geolocations
- Headless browsers (Puppeteer, Playwright, Selenium) and antidetect tooling driving sessions from United Kingdom
- Country-spoofing — when a session claims to be in United Kingdom but the network telemetry says otherwise
One API call. Bearer token. Done.
const r = await fetch('https://sntlhq.com/v1/evaluate', {
method: 'POST',
headers: { 'Authorization': 'Bearer sk_live_...' },
body: JSON.stringify({ token: sentinelToken })
});
const { decision, country, network } = await r.json();
if (country === 'GB' && network.vpn) blockOrChallenge();
Stop UK VPN, proxy & bot fraud today
Free tier. 1,000 API requests per hour. No credit card. Detects VPN, residential proxy, datacenter, and bot traffic from United Kingdom and 195 other countries.