I have an Adsense account, but now I run several websites. When my Adsense account was approved it was for a specific domain. Is it against the rules by using one Adsense account with multiple domains? I read the Adsense TOS and Googles FAQ and couldn't find anything. Anyone know 100%?

Mike

You can use the same adsense account on different sites. But make sure the site is inline with google terms otherwise if you get banned you will be banned on all sites.

Yes You can use same adsense account on multiple sites but remember the policies of adsense which are assential for website acceptance.