The most common DNS records are:
- A Record (Address mapping record): Associates a domain name with its corresponding IP Address (IPv4). Also known as a DNS Host Record.
- AAAA Record (Address mapping record for version 6 IP Addresses): Associates a domain name with its corresponding IP Address (IPv6).
- CERT Record (Certificate record): Associates a domain name with encryption certificate (PGP, PKIX, SPKI, etc).
- CNAME Record (Canonical Name record): Alias a local hostname (subdomain) to another hostname (remote FQDN).
- MX Record (Mail eXchanger record): Links domain name to SMTP email server with numeric priority.
- NS Record (Name Server record): Associates a domain name with its authoritative Name Servers (remote FQDN).
- PTR Record (Reverse-lookup Pointer Record): Allows a DNS Resolver to receive a hostname in response to an IP address query (reverse DNS lookup).
- SOA Record (Start of Authority): Specifies Authoritative Name Server for the current DNS zone, domain administrator contact data, domain serial number, DNS data refresh frequency for the zone, etc.
- SRV Record (Service Location record): Link domain name with communication protocol (TCP, UDP, TLS) for service discovery (
- TXT Record (Text record): Link domain name to external service query/setting/service such as DKIM, DMARC, SPF, etc, via machine-readable payload.