How does VPN and proxy detection work?

Prynt resolves each IP at the network layer — checking it against curated datacenter CIDR ranges, Tor exit-node lists, known VPN/proxy pools and an IP-reputation blocklist, then cross-references ASN and geo. Residential proxies are caught by behavioral and reputation signals, not just IP lists.

Can you detect residential proxies?

Yes. Residential proxies route through real consumer IPs to evade datacenter blocking, so Prynt layers reputation-network signals, ASN anomalies and device behavior on top of IP lists to flag them.

Prynt

Network intelligence

See through VPNs, proxies and Tor

Resolve every IP at the network layer — VPN, proxy, Tor, datacenter and residential-proxy exits, with ASN, reputation and geo — from live, self-hosted datasets.

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Why IP lists alone are not enough

Blocking datacenter ranges catches the lazy fraudster. The serious ones buy residential-proxy access — real consumer IPs that sail past any IP blocklist. Robust network intelligence has to combine curated IP data with reputation and behavior, and it has to stay fresh. Prynt ships all of it, and because it is self-hosted, the raw IP data never leaves your infrastructure.

VPN & proxy pools

Match against continuously refreshed VPN and open/anonymous-proxy IP pools — updated on a cron so coverage never goes stale.

Datacenter CIDRs

Thousands of datacenter and hosting-provider ranges flag traffic that claims to be a home user but originates in the cloud.

Tor exit nodes

The live Tor exit-node list is ingested and matched so anonymized traffic is scored the moment it arrives.

Residential proxies

The hardest class — caught with reputation-network signals, ASN anomalies and behavior, not naive IP lists alone.

IP reputation

A blocklist of known-abusive IPs feeds a reputation score you can weigh in your own rules.

ASN & geo

Autonomous-system and geolocation context surface hosting ASNs and location mismatches behind an anonymizer.

Live datasets, refreshed automatically

Prynt bind-mounts IP datasets and refreshes them on a schedule — datacenter CIDRs, Tor exits, VPN pools and an abuse blocklist — so detection improves without a redeploy. Optional MaxMind GeoLite2 adds ASN and city-level geo.

Score it, then act

Every check contributes to the suspect score with explicit reason codes (VPN_DETECTED, DATACENTER_IP, TOR_EXIT), so you decide whether an anonymized session is allowed, challenged with Prynt Challenge, or blocked — per action, per tenant.

Bot detection · Account takeover · Device fingerprinting · Residential proxy detection · VPN detection guide · Glossary