DNS Propagation Checker
Check a domain's DNS records against public resolvers around the world to see if changes have propagated.
DNS Tools
14 free tools
Free DNS tools to check DNS propagation worldwide, look up CNAME, NS, MX, DNSKEY and DS records, find the hostname behind an IP, and check SPF, DKIM, DMARC and BIMI email records.
All 14 dns tools
Domain DNS Health Checker
Validate a domain's DNS setup: nameservers, SOA, mail records, SPF, DMARC, DNSSEC and more in one report.
CNAME Lookup
Find the canonical name (CNAME) record and full alias chain for any host name.
DNS Lookup
Look up A, AAAA, MX, NS, TXT, CNAME, SOA and CAA records for any domain.
NS Lookup
See the authoritative nameservers for a domain and their IP addresses.
MX Lookup
List a domain's mail servers (MX records) in priority order with their IP addresses.
Reverse IP Lookup
Find the hostname (PTR record) behind any IPv4 or IPv6 address.
DNSKEY Lookup
Look up a domain's DNSSEC public keys (DNSKEY records) with flags, algorithm and key tag.
DS Record Lookup
Check the DS (delegation signer) records that link a domain to DNSSEC at its parent zone.
SPF Record Checker
Look up and validate a domain's SPF record, count DNS lookups and explain every mechanism.
DKIM Checker
Look up and validate a DKIM public key record for a domain and selector.
DMARC Checker
Look up and validate a domain's DMARC policy and explain every tag.
DMARC Record Generator
Build a valid DMARC TXT record with policy, reporting and alignment options.
BIMI Checker & Generator
Check a domain's BIMI record and logo, or generate a new BIMI record.
Practical guides
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How to Use DNS Propagation Checker
Check DNS propagation worldwide. Query 22 public DNS resolvers in 11 countries for A, AAAA, MX, NS, TXT, CNAME and more records at once.
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How to Use Domain DNS Health Checker
Run a DNS health check for any domain: nameservers, SOA timers, web and mail records, SPF, DMARC, DNSSEC and CAA, with clear pass and warning results.
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How to Use CNAME Lookup
Look up the CNAME record of any host name and follow the full alias chain to the final canonical name and its IPv4 and IPv6 addresses.
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How to Use DNS Lookup
Look up A, AAAA, CNAME, MX, NS, TXT, SOA and CAA DNS records for any domain, or reverse DNS (PTR) for an IP address. Free online DNS lookup tool.
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How to Use NS Lookup
Find the authoritative nameservers (NS records) of any domain, with the IPv4 and IPv6 address of each nameserver and its TTL, in seconds.
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How to Use MX Lookup
Look up the MX records of a domain to see which mail servers receive its email, in priority order, with IP addresses and the email provider.
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