Help with 301 redirect from subdomain to root domain

Question

I need to forward existing subdomain links to the root domain as the subdomain no longer exists. I have tried so many different lines of code in my .htaccess file and can not get the redirect to work.

The links to the subdomain look like: http://sub.example.com/dir/y99bb4

Can anyone suggest any code for me?

Answer 1

To redirect requests for sub.example.com/uri to example.com/uri:

RewriteEngine on
RewriteCond %{HTTP_HOST} ^sub.example.com$
RewriteRule ^(.*)$ http://example.com/$1 [R=301,L]

To redirect requests for sub.example.com/uri to example.com:

RewriteEngine on
RewriteCond %{HTTP_HOST} ^sub.example.com$
RewriteRule ^(.*)$ http://example.com/ [R=301,L]