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

DNS Propagation Checker

Check a domain's DNS records against public resolvers around the world to see if changes have propagated.

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.

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