A CNAME (Alias) record points to an A (Host) record. One can create multiple CNAME records and point them to an A record.
CNAMEs can only be set for subdomains that are registered with 1&1. If using a CNAME, all DNS(Domain Name System) settings configured through the 1&1 Control Panel will be discarded. A CNAME can be thought of as a kind of pointer for DNS. Instead of specifying DNS settings for a domain in the Control Panel, using a CNAME indicates that the DNS settings for the Subdomain should be exactly the same as the DNS settings for the CNAME address.
Note: You might need to configure a CNAME record first.
Follow the instructions provided below to move Subdomain from A-Record to CNAME on 1&1 hosting:
- Log in to the 1&1 Control Panel and select the relevant package.
- Click Manage Domains from the Domains panel.
- Locate the domain that contains the subdomain one wants to modify and then click Manage Subdomains.
- Check the box next to the Subdomain to select it.
- Click Edit DNS Settings from the Subdomain Settings drop-down menu.
- Select the CNAME option.
- Enter the CNAME address cms.mobileapphelper.com in the Alias text box
- Check the box to acknowledge that you are aware all current DNS settings will be disabled by using a CNAME instead.
- Click Save button to continue.