About DNS Records

DNS (Domain Name System) records are instructions that provide information about a domain, including its IP addresses, mail servers, and other services. Common record types include:

• A (Address) - Maps a domain to an IPv4 address
• AAAA - Maps a domain to an IPv6 address
• CNAME (Canonical Name) - Creates an alias pointing to another domain
• NS (Nameserver) - Specifies authoritative nameservers for the domain
• SOA (Start of Authority) - Contains administrative information about the zone
• MX (Mail Exchange) - Specifies mail servers for the domain
• TXT (Text) - Stores arbitrary text data, often used for domain verification and policies
• SPF (Sender Policy Framework) - Declares which mail servers are authorized to send email for the domain (often stored in TXT records)
• DKIM (DomainKeys Identified Mail) - Publishes public keys for email signing to verify authenticity (stored as a TXT record)
• DMARC (Domain-based Message Authentication, Reporting, and Conformance) - Specifies email authentication and reporting policies (stored as a TXT record)
• SRV (Service) - Specifies servers and ports for specific services
• CAA (Certification Authority Authorization) - Specifies which certificate authorities may issue SSL/TLS certificates for the domain
• PTR (Pointer) - Maps an IP address to a domain name (reverse DNS)