redirecting all subdomains to main domain

[basit74 Profile]

I would like to redirect all the subdomains to main domain.

i.e

abc.example.com should be redirected to example.com

similarly

xyz..example.com should also be redirected to example.com

[Anton]

Hello,

It should look like this:

RewriteBase /
RewriteCond %{HTTP_HOST} ^(?!www\..*)(.+)\.example\.com$ [NC]
RewriteRule (.*) http://example.com/$1 [R=301,L]