Citizenship and Immigration Services is located at 2852 Harris St. Bldg. 1180 Port Hueneme, CA 93043-4405, , . Citizenship and Immigration Services can be reached by their main phone number at (805) 982-3124. Alternatively, you can reach Citizenship and Immigration Services by phone at (805) 982-1443. The listed DSN line is 805-551-1443. Visit the Citizenship and Immigration Services website by clicking here.