U.S. Citizenship and Immigration Services
You can find immigration forms, fees, and helpful information on various immigration benefits.
www.uscis.gov

U.S. Immigration and Customs Enforcement
You can find information about the Student and Exchange Visitor Program (SEVP) and the SEVP I-901 on this site.
www.ice.gov/index.htm

U.S. Customs and Border Protection
You can find information about going through customs, printing your electronic I-94, and border wait times.
www.cbp.gov/

All the Embassies of Washington, D.C.
You can find contact information for all the foreign embassies located in Washington, DC. Depending on the embassy's website, you may be able to determine other immigration and tourist information for some countries.
www.embassy.org/embassies/index.html

Links to United States Embassies and Consulates Worldwide
Go to the website of the U.S. Embassy or Consulate in a particular country to find out the hours of operation, procedures for obtaining or renewing your F-1 visa, and typical processing times.
usembassy.state.gov

Department of State Services
You can obtain general information regarding visas, passports, and travel outside the United States.
www.travel.state.gov/