👨🔧 Developer recommended.
There are sometimes issues that can happen when setting up your CNAME record. See below for instructions on how to fix them.
Steps
Go to your whatsmydns.net
Change the search to "CNAME" record
Enter the CNAME record you want to check. If you set up a "www" subdomain, enter "www.sitename.com". If you used another subdomain, enter that subdomain address into the field.
Note: Replace "sitename.com" with your own domain name
Results
Green checkmarks mean that the domain is propagating correctly. Please wait 24-48 hours before contacting your web host.
Red X's in the results means that the domain is not propagating correctly.
A combination of green and red means the domains are still propagating. Please wait 24-48 hours before contacting your web host
Here are a couple more reasons why you might run through some issues:
1-Your host is just taking some time to update your new CNAME.
2-CNAME is not pointing to custom.clustdoc.com