DNS Record Types

A Address Record (IPv4) An A record maps a domain name to an IPv4 address (32 bits). The most basic and common DNS record.… AAAA IPv6 Address Record AAAA ("quad-A") is the IPv6 equivalent of A. Maps a domain to a 128-bit IPv6 address.… CNAME Canonical Name Record CNAME creates an alias: name A points to name B (not to an IP). Whatever B resolves to applies to A.… MX Mail Exchanger Record MX specifies which server accepts email for a domain. Has a priority — lower number = higher priority.… TXT Text Record TXT holds arbitrary text. In practice used for SPF, DKIM, DMARC, and domain verification.… NS Name Server Record NS indicates which servers are authoritative for the domain.… SOA Start of Authority Record SOA is a mandatory record describing zone parameters: serial, refresh, retry, expire, minimum TTL.… CAA Certification Authority Authorization CAA specifies which Certificate Authorities are allowed to issue TLS certificates for the domain.… SRV Service Locator SRV points to a hostname and port for a specific service. Used by XMPP, SIP, Minecraft, Matrix.… PTR Pointer Record (Reverse DNS) PTR implements reverse DNS: returns a hostname for an IP address. Lives in the in-addr.arpa (IPv4) / ip6.arpa …