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Alibaba Cloud DNS:DNS record types supported by Private DNS

Last Updated:Jan 09, 2024

The following table describes the DNS record types supported by Private DNS.

Record type

Value

Hostname format

A

An A record maps a domain name to an IPv4 address in the dotted decimal notation format.

A string that contains letters, digits, hyphens (-), underscores (_), and at signs (@).

AAAA record

An AAAA record specifies an IPv6 address.

A string that contains letters, digits, hyphens (-), underscores (_), and at signs (@).

MX record

An MX record specifies the domain name of a mail server. You can set priorities for different email servers. Valid priority values: 1 to 99. A smaller value indicates a higher priority. The maximum value is 50 in the Alibaba Cloud DNS console and 99 in API operation calls.

A string that contains letters, digits, hyphens (-), underscores (_), and at signs (@).

Text (TXT) record

A TXT record must be less than 512 bytes in length. Valid characters include lowercase letters, uppercase letters, digits, spaces, and the following special characters: - _ ~ = : ; / . @ + ^ !

A string that contains letters, digits, hyphens (-), underscores (_), and at signs (@).

Canonical name (CNAME) record

A CNAME record maps a domain name to another domain name.

A string that contains letters, digits, hyphens (-), underscores (_), and at signs (@).

Pointer (PTR) record

A PTR record maps an IP address to a domain name.

A number between 0 and 255.

Service (SRV) record

An SRV record is in the Priority Weight Port Destination Address format. Value elements are separated by spaces.

Example: 0 5 5060 sipserver.example.com.

The format is Service name.Protocol type.

Example: _sip._tcp.