DNS Record Types Reference

Maps a hostname to an IPv4 address.

example.com. A 93.184.216.34

Maps a hostname to an IPv6 address.

example.com. AAAA 2606:2800:220:1::1

Aliases one hostname to another; the target is resolved recursively.

www.example.com. CNAME example.com.

Specifies mail servers responsible for accepting email, with a priority value.

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

Arbitrary text, commonly used for SPF, DKIM, domain verification.

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

Delegates a DNS zone to a set of authoritative name servers.

example.com. NS ns1.example.com.

Holds administrative info about the zone: primary NS, admin email, serial, refresh/retry timers.

example.com. SOA ns1.example.com. admin.example.com. 2024010101 ...

Maps an IP address back to a hostname, used for reverse DNS lookups.

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

Defines the hostname, port, priority, and weight for a specific service.

_sip._tcp.example.com. SRV 10 60 5060 sipserver.example.com.

Specifies which certificate authorities may issue certificates for the domain.

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

Used for regex-based rewriting rules, often in SIP/ENUM.

example.com. NAPTR 100 10 "U" "E2U+sip" ...

Part of DNSSEC — links a child zone's key to the parent zone for chain of trust.

example.com. DS 12345 8 2 ABCDEF...

Part of DNSSEC — publishes the public key used to verify signed records.

example.com. DNSKEY 256 3 8 AwEAAa...

Part of DNSSEC — a digital signature over a set of records.

example.com. RRSIG A 8 2 3600 ...

Legacy record describing host CPU and OS; rarely used today.

example.com. HINFO "INTEL-386" "LINUX"

Legacy record type superseded by TXT records for SPF; deprecated by RFC 7208.

example.com. SPF "v=spf1 -all"