DNS and Email Records100% Free16 tools

Free DNS Tools: Lookup, Checker and Email Record Tools

These free DNS tools help you look up records, check propagation, validate email authentication and inspect DNSSEC. Every tool runs live queries, needs no signup and uses no paid API.

Propagation and records

DNS CheckerTest whether a DNS record has spread to 48 public DNS servers worldwide. DNS Record ValidationCatch missing name servers, CNAME conflicts and broken mail targets. CNAME LookupFollow a CNAME chain and see the final address it resolves to. NS LookupFind the authoritative name servers of any domain and their IP addresses. Clear DNS CachePick your system and copy the exact command to flush the DNS cache.

Email

MX LookupSee which mail servers receive email for a domain, in priority order. SPF Record CheckerFind and validate an SPF record, count its DNS lookups and flag errors. DMARC CheckerLook up and validate the DMARC policy of a domain, tag by tag. DKIM CheckerVerify a DKIM record by selector and check its key length. DMARC Record GeneratorBuild a valid DMARC TXT record from a simple form and copy it.

DNSSEC

DNSKEY LookupView DNSSEC public keys with key tags, roles and algorithms. DS Record LookupCheck DS records and test them against the domain DNSKEY.

Diagnostics

Domain DNS Health CheckerTest every name server and review mail and security records in one report. DNS Delegation CheckCompare the registry delegation with your zone and find lame servers.

Domain tools

Domain GeneratorTurn a keyword into dozens of short, brandable domain name ideas. Subdomain FinderTest common subdomain names against the real name servers of a domain.

How These DNS Tools Work

Each tool sends real DNS queries from our server to public resolvers and, where needed, straight to your authoritative name servers. The answers are shown as they come back, with TTL values and plain-language checks.

No account is needed and nothing you enter is stored. Domain names are used only to run the lookup. To keep the service fast for everyone, each visitor can make a limited number of requests per minute.

Which DNS Tool Should I Use?

Changed a record? Use the propagation checker to see which servers already have it.
Email going to spam? Check SPF, DKIM and DMARC, then review your mail servers with the MX records tool.
Something feels broken? Run the full domain health report to test every name server.
Using DNSSEC? Compare the DNSKEY and DS records to confirm the chain of trust.

Standards: RFC 1035, the DNS specification.