DNS record types
A, AAAA, CNAME, MX, TXT and the rest, with examples.
DNS record types
| Type | Name | What it holds | Example |
|---|---|---|---|
| A | Address | The IPv4 address of a name. | example.com. A 93.184.216.34 |
| AAAA | IPv6 address | The IPv6 address of a name. | example.com. AAAA 2606:2800:220:1::1 |
| CNAME | Canonical name | An alias: this name is another name. It can not sit at the zone's apex or beside other records. | www CNAME example.com. |
| MX | Mail exchanger | Where mail for the domain goes, with a priority (lowest first). | example.com. MX 10 mail.example.com. |
| TXT | Text | Free text; used for SPF, DKIM, DMARC and ownership checks. | example.com. TXT "v=spf1 include:_spf.example.net -all" |
| NS | Name server | The servers that answer for the zone, and the delegation to a child zone. | example.com. NS ns1.example.net. |
| SOA | Start of authority | The zone's primary server, contact, serial number and refresh timers. | example.com. SOA ns1.example.net. hostmaster.example.com. 2026092601 7200 3600 1209600 300 |
| PTR | Pointer | The name for an IP address: reverse DNS, in the in-addr.arpa zone. | 34.216.184.93.in-addr.arpa. PTR example.com. |
| SRV | Service | The host and port for a service, with priority and weight. | _sip._tcp.example.com. SRV 10 60 5060 sip.example.com. |
| CAA | Certificate authority authorization | Which certificate authorities may issue certificates for the domain. | example.com. CAA 0 issue "letsencrypt.org" |
| DS | Delegation signer | DNSSEC: a hash of a child zone's key, held in the parent. | example.com. DS 12345 13 2 abcdef... |
| DNSKEY | DNS public key | DNSSEC: the public key that signs the zone. | example.com. DNSKEY 257 3 13 ... |
| RRSIG | Resource record signature | DNSSEC: the signature over a set of records. | example.com. RRSIG A 13 2 300 ... |
| NSEC | Next secure | DNSSEC: proves a name does not exist. | a.example.com. NSEC z.example.com. A RRSIG NSEC |
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