Do subdomains need to be defined through domain registrar?

Posted by Johnny on Pro Webmasters See other posts from Pro Webmasters or by Johnny
Published on 2012-08-31T16:05:41Z Indexed on 2012/09/01 3:49 UTC
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subdomain

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godaddy

I have bought a new domain name from GoDaddy. Let's say it is abcd.com.

On GoDaddy's DNS Managing page, I changed A(Host) part to

@ = 74.125.232.215

which is www.google.co.uk's IP address.

Now if I type www.abcd.com, it directly goes to www.google.co.uk.

But if I type http://test.abcd.com, it cannot be loaded.

Do I need to define every subdomain through GoDaddy? Is this how it works?

P.S. Amazon EC2 directly generates a subdomain for users to reach their virtual PCs. It cannot be domain registrar dependant.

P.S.2. Same question for using "www2" at the start of url.

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