Changing a Domain's IPv4/IPv6 Address (A/AAAA Record)

While using the IONOS name servers, you can connect your domain with a static IP address. This is possible by configuring an Address Resource Record or A record. The configuration of an A or AAAA record is necessary, for example, in order to use a IONOS domain with a Cloud Server, a Managed Cloud Hosting project, or with a server that is located with a third-party provider.

You can specify several A records for a subdomain. For certain applications, such as Squarespace, this function is important.

Using a Domain with Squarespace

In other circumstances, however, this can also lead to problems. Your applications will then normally use the first IP address returned by the DNS resolver. For A records with multiple IP addresses, the IP addresses are returned in random order. We therefore recommend that you delete or edit existing A/AAAA records to avoid conflicts.

  • Deleting A/AAAA Records: You can use the Actions column in your domain's DNS settings to delete existing A/AAAA records at any time by clicking on thegear symbol and selecting  Delete Record.
  • Editing A/AAAA Records: See the steps below.

Checking Your DNS Settings for Existing Entries

  • In the Domains section of the Control Panel, click on the Gear SYMBOL for the desired domain under Actions and then on DNS.

  • Check whether an A record already exists.

  • If an A record has already been added to the DNS settings, check the host name and the entered value. Make sure that only one A record is listed in the DNS settings. If the A record belongs to a service, it must be deactivated.

Editing A Records

You can adjust existing A records in the Control Panel. To do this, simply follow these steps:

  • In the Domains > DNS section of the Control Panel next to the desired A record, click on the Gear SYMBOL under Actions and select Edit Record.

  • Specify the desired IP address in the Points To field.

  • Optional: Select the desired TTL.

  • By default, your changes will become active immediately.

  • Click SAVE.

Adding an A Record

To add a new A record, follow these steps:

  • In the Domains section of the Control Panel, next to your desired domain, click on thegear symbol under Actions and selectDNS.

  • Click Add Record and select the A type.

  • In the Host Name field, specify the desired host. To create the A record for your domain, enter the @ character. The @ character is used as a placeholder and ensures that the domain is connected with www and all subdomains. If you want to create the A record for a specific subdomain, enter the desired subdomain, such as www.

  • In the Points to field, enter the desired IPv4 address.

  • Optional: Select the desired TTL. By default, your changes will become active immediately.

  • Below the Preview for www row, you can select whether or not you would like to also add this record to the www subdomain.

  • Click Save.

Adding an AAAA Record

Optionally, you can also create an AAAA record to connect your domain to an IPv6 address.

  • In the Domains section of the Control Panel, next to your desired domain, click on thegear symbol under Actions and selectDNS.

  • Click Add Record and select the AAAA type.

  • In the Host Name field, specify the desired host. To create the A record for your domain, enter the @ character. The @ character is used as a placeholder and ensures that the domain is connected with www and all subdomains. If you want to create the AAAA record for a specific subdomain, enter the desired subdomain, such as www.

  • In the Points to field, enter the desired IPv6 address.

  • Optional: Select the desired TTL. By default, your changes will become active immediately.

  • Below the Preview for www row, you can select whether or not you would like to also add this record to the www subdomain.

  • Click Save.

Checking Your Changes

Your changes are effective at IONOS immediately. However, it can take up to 1 hour for the change to take effect externally due to the decentralized structure of the Domain Name System. You can check the status of the A/AAAA record via the DNS Checker website.


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