how to redirect all subdomains to root?

how to redirect all subdomains to root ?
recently i registred a expired domains , i see it was blogging service before and so has many sub domains with many backlinks
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now i want to redirect all subdomains to root

for example

blog1.mysite.co to mysite.co
blog2.mysite.co to mysite.co
blog3.mysite.co to mysite.co
user1.mysite.co to mysite.co
use2.mysite.co to mysite.co

and any other subdomain

is it possible with htaccess ?
You can do that on Cpanel, or better still, if you're using wordpress you can also do that with a plugin called "Redirection".
do you know how to fix it or just wanted to say a spam

if you know go ahead tell me

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