VPN & Proxy Detection — PortugalDetect VPN, Proxy & Bot Traffic from Portugal
Maskbreak scores every visitor's network in real time — flagging VPN exit nodes, residential proxies, datacenter ASNs, and headless browsers originating from Portugal. Free API. Under 40ms server-side. No CAPTCHAs.
The networks Portugal traffic actually arrives from
Portugal has 141 autonomous systems on the public registry. 19 of them are hosting, cloud or transit networks holding 6.4M addresses between them — the ranges a commercial VPN or datacenter proxy exits from. Residential broadband is the rest, and that is the traffic worth watching, because a residential proxy hides inside it.
| ASN | Network | IPv4 space |
|---|---|---|
| AS3243 | MEO-RESIDENCIAL | 1.8M addresses |
| AS2860 | NOS_COMUNICACOES | 1.8M addresses |
| AS12353 | VODAFONE-PT Vodafone Portugal | 1.2M addresses |
| AS1930 | RCCN Fundacao para a Ciencia e a Tecnologia, I.P. | 360K addresses |
| AS42863 | MEO-MOVEL | 255K addresses |
| AS13156 | AS13156 Palmela | 214K addresses |
| AS1897 | EUNET | 204K addresses |
| AS15525 | MEO-EMPRESAS | 155K addresses |
Largest hosting-shaped networks registered in Portugal, by IPv4 allocation. Registry data, refreshed daily. A datacenter ASN is not evidence of fraud on its own — it is one signal, weighed alongside device and behaviour.
Why Portugal traffic needs special scrutiny
Datacenter ASN concentration
A rising residential-proxy market centres on MEO and NOS consumer ranges sold to ad-fraud operators.
Residential proxy resale
Consumer ISP ranges in Portugal 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 Portugal. Maskbreak 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 Portuguese-targeted SaaS, fintech, and e-commerce increasingly uses Kameleo, GoLogin, or AdsPower to spoof device fingerprints. Maskbreak scores these at the device layer, not the IP layer.
What Maskbreak detects for Portugal traffic
- Every major VPN provider's Portuguese exit nodes (NordVPN, ExpressVPN, ProtonVPN, Mullvad, Surfshark, and 40+ more)
- Commercial or peer-to-peer residential proxy pools using consumer Portuguese IPs
- Datacenter ASNs commonly used for automation (AWS, GCP, Azure, OVH, Hetzner, DigitalOcean, Vultr, Linode)
- Tor exit nodes and known anonymous relays advertising Portuguese geolocations
- Headless browsers (Puppeteer, Playwright, Selenium) and antidetect tooling driving sessions from Portugal
- Country-spoofing — when a session claims to be in Portugal but the network telemetry says otherwise
One API call. Bearer token. Done.
// Server-side only: an sk_live_ key must never reach the browser.
const r = await fetch('https://maskbreak.com/v1/evaluate', {
method: 'POST',
headers: {
'Authorization': 'Bearer sk_live_...',
'Content-Type': 'application/json'
},
body: JSON.stringify({ token: req.body.monocle })
});
const { decision, country, network } = await r.json();
if (country === 'PT' && network.vpn) blockOrChallenge();
Stop Portuguese VPN, proxy & bot fraud today
Free tier: 1,000 requests/hour. No card, no expiry. Detects VPN, residential proxy, datacenter, and bot traffic from Portugal and 195 other countries.