Website addresses
A records use IPv4; AAAA records use IPv6. Both connect hostnames to servers.
Domain diagnostics
DNS Lookup Tool
Check the records that connect a domain to websites, email platforms, verification services and authoritative nameservers.
Bounded lookup 9 record types No account required
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Look up DNS records
Paste a domain or full URL. The hostname will be normalized automatically.
Lookups may be sent to Google Public DNS and otherwise use the server resolver. Domain queries are not saved by this tool. See our privacy policy.
DNS record guide
Understand the records behind a domain
Email routing
MX records identify mail servers. A lower priority number is preferred first.
Policies and verification
TXT commonly carries SPF rules, ownership checks and service configuration.
Authority and aliases
NS identifies authoritative DNS; CNAME points one hostname to another.
Certificate authority
CAA specifies which certificate authorities may issue TLS certificates.
Zone and services
SOA describes the DNS zone, while SRV locates named network services.
DNS lookup questions
What does a DNS lookup show?
A DNS lookup shows records published for a domain, including website addresses, mail servers, nameservers, aliases and verification text.
What is the difference between A and AAAA records?
An A record points to an IPv4 address, while an AAAA record points to an IPv6 address.
What does MX priority mean?
Lower MX priority numbers are preferred first. Backup mail servers normally use higher priority numbers.
Why can DNS results differ between resolvers?
Resolvers cache records for their TTL period, so recently changed records may appear at different times in different locations.
What is a TXT record used for?
TXT records commonly publish SPF email rules, ownership verification and other machine-readable domain policies.