How do I add 'www' before a subdomain, like www.subdomain.domain.com?

Question

I want to add www in front of a subdomain e.g. www.subdomain.domain.com.

My blogs are hosted on Blogger and am using GoDaddy for having custom domains.

I have HOST @ entries for 'domain' pointing specified by blogger. The following subsdomains are configured by adding CNAME alias as follows:

subdomain -> ghs.google.com
www -> ghs.google.com   

For domain (including www.domain) I have one blog. For subdomain, I am pointing it to seperate blog using above entries and subdomain.domain.com works fine.

I read articles on this issue and tried adding following CNAME entry but no luck:

www.subdomain  ->  subdomain.domain.com

How do I make www.subdomain.domain.com work ?

Answer 1

As you mentioned GoDaddy the subdomains there can be managed using web control panel - as enabled using Hosted Domains link in the menu using Add Subdomain link, see more here support.godaddy.com

Answer 2

Blogger can’t use two domains for the same blog. On a subdomain, it will read the www. differently than with a regular domain. It reads the www. as another separate domain, while on a second level domain, the www. will be included as one you can use. In fact, Blogger can’t host blogs on naked domains, so on a regular domain, they automatically go to the www. subdomain to host it on as if it’s just the main website and have the naked domain redirect to the www. version.

Your records should be for subdomain and www.subdomain, not just www, unless you are already in the DNS zone for the subdomain. If you put those records in the DNS zone for your domain, and it doesn’t work, it ain’t gonna.