DNS Lookup Tool

A DNS lookup queries the Domain Name System to translate a human-friendly domain name — like example.com — into the machine-readable records that power the internet. Every time you open a website, send an email, or connect to an API, a DNS lookup happens behind the scenes to find the correct server address.

This free online DNS lookup tool lets you query any public domain against Cloudflare's 1.1.1.1 or Google's 8.8.8.8 resolvers directly from your browser. It supports all major record types including A, AAAA, MX, CNAME, TXT, NS, SOA, SRV, CAA, and PTR. Results include the full record data, TTL values, DNSSEC validation status, and response time.

How This Tool Works

Unlike traditional DNS utilities that require a command-line terminal, this tool uses DNS-over-HTTPS (DoH) to send encrypted queries from your browser to the selected public resolver. The resolver performs the recursive lookup and returns a JSON response that this page parses and displays. No server-side code is involved — your queries never touch our infrastructure.

Common Use Cases

Network administrators use DNS lookups to verify that record changes have propagated, diagnose email delivery problems by checking MX and TXT (SPF/DKIM/DMARC) records, and audit DNSSEC configuration. Developers use them to confirm API endpoints, troubleshoot connectivity issues, and validate SSL/TLS certificate authority authorisation via CAA records. Security professionals check for unauthorized DNS changes or dangling CNAME records.

Understanding DNS Record Types

A and AAAA records map domains to IPv4 and IPv6 addresses respectively. CNAME records create aliases pointing one domain to another. MX records direct email to the correct mail servers with priority values. NS records list the authoritative name servers for a zone. TXT records hold verification strings, SPF policies, and DKIM keys. SOA records contain zone metadata such as the primary name server, administrator email, serial number, and refresh intervals. SRV records specify hosts and ports for services like SIP or XMPP. CAA records control which certificate authorities may issue certificates for the domain.