As of February 2015, the phone number to the National Customer Service Center of the U.S. Citizen and Immigration Offices is 1-800-375-5283. This toll-free phone number is available in both English and Spanish.
The NCSC provides assistance by telephone to anyone within the United States as well as those in Guam, the U.S. Virgin Islands and Puerto Rico. For callers outside of the United States, the NCSC can be reached at 212-620-3418. The NCSC boasts accurate, consistent information on immigration services and benefits. This phone line is open for automated assistance every day of the week, 24 hours a day.