Whether or not CLEP exams count as college credit hours depends on the college or university you're applying the credit to.
Each institution sets its own policies. Some accept CLEP credit, others don't. And even those that do accept it might have limitations on the number of CLEP credits they'll award or which specific CLEP exams they'll accept.
To find out if a particular college or university will accept CLEP credit, you need to check their admissions or registrar's office website, or contact them directly.