Make wordpress work on all subdomains?

Hello.

How do I make the wordpress run on all subdomains, this is for tracking reasons.

For example, let’s say I run: http://website.com.

I want:

http://aff1.website.com
http://aff2.website.com
http://aff3.website.com

To all work on the same wordpress site where the subdomains adjust accordingly.

How can I do this?

Thank you.