United States Citizenship and Immigration Services | United States Citizenship and Immigration Services
111 Massachusetts Ave NW, Washington, DC 20529-2260
Eligibility
Varies by service
Hours
Mon-Fri 8am-8pm Eastern Time customer service
24-hours automated service
800-767-1833
Voice·
Toll-Free TTY
877-247-4645
Voice·
Toll-Free Military Helpline: 877-CIS-4MIL
800-375-5283
Voice·
Toll-Free
Website
https://www.uscis.govApplication process
Call, visit website, or write
Fees
Vary by application and petition
Service area
All ZIP Codes, AZ
Administers programs related to the lawful immigration to the United States.
Last Assured
10/01/2025
Providing organization
United States Citizenship and Immigration Services
Administers programs related to the lawful immigration to the United States.