DNS Record Types Reference

AAddress

Maps a domain name to an IPv4 address.

example.com. IN A 93.184.216.34

AAAAIPv6 Address

Maps a domain name to an IPv6 address.

example.com. IN AAAA 2606:2800:220:1:248:1893:25c8:1946

CNAMECanonical Name

Creates an alias from one domain name to another. Cannot be used at zone apex.

www.example.com. IN CNAME example.com.

MXMail Exchange

Specifies mail servers responsible for accepting email for the domain.

example.com. IN MX 10 mail.example.com.

TXTText

Holds arbitrary text data. Commonly used for SPF, DKIM, domain verification.

example.com. IN TXT "v=spf1 include:_spf.google.com ~all"

NSName Server

Delegates a DNS zone to use the given authoritative name servers.

example.com. IN NS ns1.example.com.

SOAStart of Authority

Contains administrative information about the zone including primary nameserver, admin email, and serial number.

example.com. IN SOA ns1.example.com. admin.example.com. 2024010101 3600 900 1209600 86400

PTRPointer

Maps an IP address to a domain name (reverse DNS lookup).

34.216.184.93.in-addr.arpa. IN PTR example.com.

SRVService

Specifies the location of servers for specific services (host, port, priority, weight).

_sip._tcp.example.com. IN SRV 10 60 5060 sip.example.com.

CAACertification Authority Authorization

Specifies which Certificate Authorities are allowed to issue certificates for the domain.

example.com. IN CAA 0 issue "letsencrypt.org"

NAPTRNaming Authority Pointer

Used for ENUM and SIP URI mapping. Supports regular expression-based rewriting.

example.com. IN NAPTR 100 10 "u" "E2U+sip" "!^.*$!sip:info@example.com!" .

DNSKEYDNS Key

Holds public keys used in DNSSEC to verify DNS data integrity.

example.com. IN DNSKEY 256 3 8 AwEAAb...

DSDelegation Signer

Used in DNSSEC to link a child zone to its parent zone.

example.com. IN DS 12345 8 2 49FD46E6C4...

RRSIGResource Record Signature

Contains a DNSSEC signature for a record set.

example.com. IN RRSIG A 8 2 3600 20240201 20240101 12345 example.com. ...

TLSATLS Authentication

Associates a TLS certificate with a domain name for DANE (DNS-Based Authentication).

_443._tcp.example.com. IN TLSA 3 1 1 2bb183af...

SSHFPSSH Fingerprint

Publishes SSH host key fingerprints in DNS for verification.

host.example.com. IN SSHFP 2 1 123456789abcdef...

ALIASAlias (non-standard)

Similar to CNAME but can be used at the zone apex. Supported by some DNS providers.

example.com. IN ALIAS other.example.com.

LOCLocation

Specifies geographical location information for a domain.

example.com. IN LOC 37 46 30.000 N 122 25 10.000 W 0.00m

HINFOHost Information

Provides information about the host CPU and operating system.

example.com. IN HINFO "Intel" "Linux"