I currently disavow the domain
example.com using Google's disavow links tool.
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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After receiving clarification on this from John Mueller at Google, disavowing a root domain will also disavow all other sub domains under it.
For example, disavowing:-
Will also disavow:-
sub23.example.com sub4646.example.com www.example.com
You can of course, disavow individual sub domains like
domain:sub23.example.com though which will only affect that individual sub domain.
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
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://www.example.com these are both to completely separate websites.
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
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
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
example.comwill not disavow