Contact Us Wish to inquire about our services, or anything else?You can walk in during office hours, give us a call or simply submit the form here. Address Purok 3, Andres Bonifacio, Diffun 3401, Quirino Philippines. Phone +63917-120-8437 Email kc_diffun@qsu.edu.ph Send Us a Message Please enable JavaScript in your browser to complete this form.Name *Email *Subject *Message *Submit