Type | Value | Definition | Description |
---|---|---|---|
A record | A | The standard address record. The resource record (RR) value can be empty. In this case, @ is used as the RR value. The domain name cannot contain underscores (_). | The record value is an IPv4 address. |
NS record | NS | The standard name server (NS) record. The RR value cannot be empty. The domain name can contain underscores (_). Wildcard DNS is not supported. | The record value is of the type specified by NameType. |
MX record | MX | The standard mail exchanger (MX) record. The RR value can be empty. In this case, @ is used as the RR value. The domain name cannot contain underscores (_). | The record value is of the type specified by NameType and cannot be an IP address. The priority can be 1 to 10. A smaller value indicates a higher priority. |
TXT record | TXT | The standard text record. The domain name can contain letters, digits, hyphens (-), and underscores (_). The RR value can be empty. In this case, @ is used as the RR value. Wildcard DNS is not supported. | The record value is a string of less than 512 characters in length. The record value can contain uppercase and lowercase letters, digits, spaces, hyphens (-), tildes (~), equal signs (=), colons (:), semicolons (;), forward slashes (/), and periods (.).@+^!* |
CNAME record | CNAME | The standard canonical name (CNAME) record. The domain name can contain letters, digits, hyphens (-), and underscores (_). The RR value cannot be empty. | The record value is of the type specified by NameType and cannot be an IP address. |
SRV record | SRV | The service name can contain underscores (_) and periods (.).The RR value can be empty. In this case, @ is used as the RR value. Wildcard DNS is not supported. | priority: the priority that ranges from 0 to 65535. weight: the weight that ranges from 0 to 65535. port: the port number that is used to provide the service and ranges from 0 to 65535. target: the service address that is of the type specified by NameType. The service address must exist. References: http://en.wikipedia.org/wiki/SRV_record http://www.rfc-editor.org/rfc/rfc2782.txt. |
AAAA record | AAAA | The standard IPv6 address record. The RR value can be empty. In this case, @ is used as the RR value. The domain name cannot contain underscores (_). | The record value is an IPv6 address. |
CAA record | CAA | The standard Certification Authority Authorization (CAA) record. The RR value can be empty. In this case, @ is used as the RR value. The domain name cannot contain underscores (_). | The record value is in the format of [flag] [tag] [value]. The record value consists of a flags byte and a property that is a tag-value pair. Example: @ 0 issue "symantec.com" or @ 0 iodef "mailto:admin@aliyun.com" |
Explicit URL forwarding | REDIRECT_URL | The standard explicit URL record. The RR value can be empty. In this case, @ is used as the RR value. | The record value is of the type specified by NameType or a URL that is case-sensitive. The record value can be up to 500 characters in length. The domain name is required and not case-sensitive. Example: a.com. The protocol is optional. Examples: http and https. Default value: http. The port number is optional. Example: 81. Default value: 80. The path is optional and case-sensitive. Example: /path/to/. Default value: /. The file name is optional and case-sensitive. Example: file.php. Default value: none. The parameters are optional and case-sensitive. Example: ?user=my***. Default value: none. |
Implicit URL forwarding | FORWARD_URL | The standard implicit URL record. The RR value can be empty. In this case, @ is used as the RR value. | The record value is of the type specified by NameType or a URL that is case-sensitive. The record value can be up to 500 characters in length. The domain name is required and not case-sensitive. Example: a.com. The protocol is optional. Examples: http and https. Default value: http. The port number is optional. Example: 81. Default value: 80. The path is optional and case-sensitive. Example: /path/to/. Default value: /. The file name is optional and case-sensitive. Example: file.php. Default value: none. The parameters are optional and case-sensitive. Example: ?user=my***. Default value: none. |
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DNS record types
Last Updated: Nov 23, 2021
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