To set multiple IP addresses for a registered name server, please follow these steps:

1. Sign in to your Dynadot account.
2. Select "My Domains" from the left-side menu bar and click "Name Servers" in the drop-down.
3. Click on the name server you want to edit. It should be a link.
4. Enter the additional IP addresses for the name server in the text boxes provided, 1 per text box.
5. Press the "Submit" button to save your changes.

NOTE: You can submit either IPv4 or IPv6 IP addresses. However, not for .WS since the central registry does not support IPv6 addresses.

Your settings should look similar to what is shown below: