How do you find the phone number for the immigration office?

The U.S. Citizenship and Immigration Services Office provides the phone number for its national customer service line and the phone numbers for local offices at the department's official website. As of 2015, the phone number for the national customer service line is (800) 375-5283.

The national customer service line offers a convenient alternative to writing a letter or taking time off work to visit a local office when seeking information, according to USCIS.gov. Both field offices located within the United States and international offices in select countries provide assistance, handle interviews and give some information beyond what is available through the national customer service line.