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Disavow the domain example.com.

What can I do if I want do disavow a subdomain? i.e. spam.site.com. I'm also assuming that if I were to disavow the domain it would include all subdomains?

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2 Answers 2

In addition to Geoff's answer:

When you talk about disavow, are you talking about Google's Webmaster Tools disavow links tool? If so, then this isn't the correct way to go about it; I will explain at the end.

Firstly all domains, for example: example.com, is a website with the Top-Level Domain being .com.

So in a simple way example.com is a subdomain of .com, obviously entering .com doesn't bring anything up, however the subdomain example.com will bring up the website as it is a separate entity.

Now expanding this, http://example.com and http://www.example.com these are both to completely separate websites. www and non-www websites both redirect (normally if set up correctly) to the same server and resolve as the DNS setting normally has 2 A records pointing to the domain name - one for non-www traffic and one for www traffic.

Now thinking about this I'm sure you can now understand that subdomain.example.com acts in the same way that www does as this is also a subdomain of example.com.

Now with regards to disavowing links, if you mean Google Webmaster Tools disavow links, this option should only be used after all necessary manual removal of the links has been made as this will show Google that you have taken the time and effort to amend whatever it is that you are doing (this is more in the case where you have been penalized by Google for unnatural links, etc...).

So in summary:

  • .com is a top-level domain (TDL).

  • example.com is (basically) a subdomain of .com, however this is your domain name.

  • www.example.com is a subdomain of example.com, but is often redirected back to the same place as example.com. This can be used for anything you want, but remember it is completely different.

  • Disavow each sub-domain individually, as diavowing example.com will not disavow a.example.com
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No, it doesn't work like that.

A subdomain is treated as it's own entity so you'd have to disavow subdomains separately like so:-

domain: domain.com
domain: subA.domain.com
domain: subB.domain.com
domain: subC.domain.com
domain: subT.domain.com

Otherwise Google's blogspot.com or wordpress.com for example would have a big problem on their hands if you think about it...

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