DNS Leak Test

Check if your DNS resolver is revealing your identity, even when using a VPN.

What is a DNS Leak?

A DNS leak occurs when your DNS queries (the domains you visit) escape outside your VPN tunnel and reach your ISP or other third parties. Even though you're using a VPN, someone may be able to monitor which websites you visit.

How to fix a DNS leak?

• Use a VPN with built-in DNS leak protection
• Configure DNS-over-HTTPS (DoH) in your browser
• Use trusted DNS servers (Cloudflare 1.1.1.1, Quad9 9.9.9.9)
• Check the DNS settings of your operating system

Explore all tools

IP & Location

IP & ASN Lookup - Look up information for any IP address or ASN.
IP Ranges by Country - List of IP subnets and ASNs for any country.
IP Calculator - Calculate subnet, CIDR and network address ranges.

DNS

DNS Lookup - Search DNS records for any domain.
DNS Propagation - Check DNS propagation worldwide.

Privacy

VPN & Proxy Check - Check if you are using a VPN or proxy.
WebRTC Leak Test - Check if your browser reveals your real IP.
Blacklist Check - Check if your IP is on any blacklist.

Domain

WHOIS Lookup - Domain registration information.
SSL Checker - Check the SSL certificate of any domain.
Redirect Checker - Detect and analyze URL redirects.

Network

Port Scanner - Scan open ports on any host.

General Tools

Password Generator - Generate strong and secure passwords.