Updated on 2023-03-16 GMT+08:00

Adding a PTR Record


You can create PTR records to map private IP addresses to private domain names.

For details about other record set types, see Record Set Types and Configuration Rules.


  • You can create PTR records only in private zones.
  • PTR records take effect only in a private zone whose domain name suffix is in-addr.arpa.

    For details about how to add a PTR record for a public domain name, see Creating a PTR Record.


  1. Log in to the management console.
  2. Hover the cursor over in the upper left corner. In the service list, choose Networking > Domain Name Service.

    The DNS console is displayed.

  1. In the navigation pane on the left, choose Private Zones.

    The Private Zones page is displayed.

  2. Click in the upper left corner and select the desired region and project.
  3. Click the domain name.
  4. Click Add Record Set.

    The Add Record Set dialog box is displayed.

  1. Configure the parameters based on Table 1.
    Table 1 Parameters for adding a PTR record



    Example Value


    Name of the PTR record


    For example, if the IP address is, the domain name in the PTR record is

    • If the private zone is 192.in-addr.arpa, enter 10.1.168 in the box.
    • If the private zone is 1.168.192.in-addr.arpa, enter 10 in the box.


    Type of the record set

    If a message is displayed indicating that the record set you are trying to create exists, the record set conflicts with an existing record set.

    For details, see Why Is a Message Indicating Conflict with an Existing Record Set Displayed When I Add a Record Set?

    PTR – Map IP addresses to domains

    TTL (s)

    Cache duration of the record set on a local DNS server, in seconds.

    The value ranges from 300 to 2147483647, and the default is 300.

    If your service address changes frequently, set TTL to a smaller value.

    Learn more about TTL.

    The default value is 300s, which is, 5 minutes.


    Private domain name mapped to the private IP address. You can enter only one domain name.



    (Optional) Identifier of the record set. This parameter is displayed when you expand More Settings.

    Each tag contains a key and a value. You can add a maximum of 10 tags to a record set.

    For details about tag key and value requirements, see Table 2.




    (Optional) Supplementary information about the record set.

    You can enter a maximum of 255 characters.


    Table 2 Tag key and value requirements



    Example Value


    • Cannot be left blank.
    • Must be unique for each resource.
    • Can contain a maximum of 36 characters.
    • Cannot start or end with a space or contain special characters =*<>\,|/



    • Cannot be left blank.
    • Can contain a maximum of 43 characters.
    • Cannot start or end with a space or contain special characters =*<>\,|/


  2. Click OK.
  3. Switch back to the Record Sets page.

    View the added record set in the record set list of the zone and ensure that its status is Normal.