The INS maintains a district office in Phoenix, Arizona, and a suboffice in Tucson. Asylum applications are submitted to the California Service Center. The INS' Phoenix District Office is located at 2035 North Central Avenue; Phoenix, AZ 85004. The INS' sub-district office is located at 6431 South Country Club Road; Tucson, AZ 85706. The Phoenix office is open from 7:30am until 1:30pm Monday through Thursday. The Tucson office is open from 8am until 2pm Monday through Friday. Click here to find the INS USCIS Immigration Forms you need! Click Here for Immigration Information, Reports, and Frequent Questions Click here to find the immigration books and manuals you need!