Cybersecurity
Look up A, AAAA, MX, NS, TXT, CNAME, and other DNS records for any domain.
Check the MX records for a domain before setting up email delivery.
Useful for troubleshooting domain configuration, mail setup, and DNS propagation issues.
Networking & Security Tool
Look up DNS records for any domain and inspect A, AAAA, CNAME, MX, NS, TXT, SOA and CAA records online.
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Enter a domain to inspect its DNS records.
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Enter a domain and select a DNS record type to begin the lookup.
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DNS, or Domain Name System, translates human-readable domain names into information that computers and network services can use. For example, a domain can have DNS records that point a website to an IPv4 or IPv6 address.
DNS is also used for services such as email delivery, domain verification, certificate authority authorization and name-server delegation.
Different DNS records provide different types of information about a domain.
Maps a domain name to an IPv4 address.
Maps a domain name to an IPv6 address.
Creates an alias pointing to another domain name.
Specifies mail servers responsible for email delivery.
Identifies authoritative name servers for a DNS zone.
Stores text information such as verification and email security data.
Contains administrative information about a DNS zone.
Specifies which certificate authorities may issue certificates for a domain.
Enter a domain such as example.com without requiring a full URL.
Select A, AAAA, MX, CNAME, NS, TXT, SOA or CAA.
Review the returned DNS records, TTL values and record data.
DNS information can be useful when troubleshooting website connectivity, email delivery, domain configuration and certificate-related issues.
DNS records are public infrastructure information. Avoid treating a DNS lookup alone as a complete security assessment. Security testing should only be performed on systems and domains you are authorized to assess.
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FAQ
A DNS lookup queries DNS information associated with a domain, such as its IP addresses, mail servers or name servers.
An A record maps a domain name or hostname to an IPv4 address.
An AAAA record maps a hostname to an IPv6 address.
An MX record identifies the mail servers responsible for receiving email for a domain.
A CNAME record creates an alias from one hostname to another canonical hostname.
An NS record identifies the authoritative DNS name servers responsible for a domain or DNS zone.
TXT records can contain domain verification information and data used by email authentication systems and other services.
TTL, or Time To Live, indicates how long DNS resolvers may cache a DNS record before querying for updated information.
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DNS changes can take time to propagate across networks, so results may vary as caches refresh.