Network & Web Tools
DNS Lookup Online Free
Look up A, AAAA, MX, TXT, CNAME, NS and SOA records for a public hostname.
About this tool
DNS translates hostnames into the records used by browsers, mail servers and other internet services. This lookup uses the server-side DNS resolver to display common public record types. It is useful for checking a new domain setup, mail routing, verification TXT values, nameserver changes and basic troubleshooting.
Common use cases
- ✓ Verify the IP address behind a domain.
- ✓ Check mail exchanger priority and hostnames.
- ✓ Review TXT records used by SPF or service verification.
- ✓ Confirm authoritative nameservers and SOA information.
How to use it
- Enter a public domain or hostname without a path.
- Choose the record type you want to inspect.
- Run the lookup and review every returned record.
- Compare the result with your DNS provider when a recent change is still propagating.
Important interpretation notes
- • DNS answers can differ by resolver, cache state and geographic location.
- • A successful DNS lookup does not prove that the website or mail service is working.
- • TXT results may contain security or verification data; avoid sharing sensitive values unnecessarily.
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Frequently asked questions
What is an A record?
An A record maps a hostname to an IPv4 address.
What is an AAAA record?
An AAAA record maps a hostname to an IPv6 address.
What is an MX record?
MX records identify mail servers and their priority for a domain.
Why do DNS changes take time?
Resolvers cache records according to TTL and may not refresh at the same moment.
Can this test DNS propagation worldwide?
No. This version uses the resolver available to the serverless function, not a global resolver network.
Does the lookup modify DNS?
No. It only reads public DNS records.