DNS Lookup & DNS Record Checker
Perform authoritative DNS lookups across all standard record types (A, AAAA, MX, CNAME, TXT, SOA, NS, PTR, SRV, CAA, TLSA, DNSKEY, DS). Query local resolvers or specify a custom nameserver IP.
Understanding DNS Resource Record Types
The Domain Name System (DNS) translates human-readable domain names into IP addresses and routes internet services. Different record types serve distinct network functions:
Common Core DNS Records
- A Record: Maps a domain to a 32-bit IPv4 address (e.g.
192.0.2.1). - AAAA Record: Maps a domain to a 128-bit IPv6 address (e.g.
2001:db8::1). - MX (Mail Exchange) Record: Points to the mail servers responsible for accepting email for the domain, along with priority weights.
- CNAME (Canonical Name) Record: Creates an alias pointing one domain name to another canonical hostname.
- TXT (Text) Record: Holds arbitrary text descriptors used for SPF verification, DMARC policies, and domain ownership validation.
- SOA (Start of Authority) Record: Specifies core zone administrative parameters, primary master nameserver, admin email, and zone serial number.
- CAA Record: Restricts which Certificate Authorities (CAs) are permitted to issue SSL/TLS certificates for the domain.