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 can appear in commercial or peer-to-peer residential proxy pools. A consumer ISP label is not proof of fraud; combine it with device, session, and routing signals.
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)
- Commercial or peer-to-peer residential proxy pools using consumer UK IPs
- 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
VPN use & data rules in the United Kingdom
The UK applies UK GDPR under the ICO, which names fraud prevention among the clearest legitimate-interest use cases — risk-scoring UK visitors requires no consent wall. The threat context is severe: fraud is consistently the most-experienced crime category in England and Wales, with authorised push payment (APP) scams driving regulatory pressure on fintechs and banks. UK consumer VPN use is mainstream and benign on its own; the patterns worth acting on are UK-geolocated residential proxy exits hitting signup and checkout flows, and automation tooling targeting the UK's dense fintech sector.
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 requests/hour. No card, no expiry. Detects VPN, residential proxy, datacenter, and bot traffic from United Kingdom and 195 other countries.