The Bureau of Industry and Security (BIS) implements U.S. Government sanctions against Cuba, Iran, North Korea, Sudan, and Syria pursuant to the Export Administration Regulations (EAR).
The license requirements, license exceptions, and licensing policy vary depending upon the particular sanctioned destination.
Also, other U.S. Government agencies administer regulations that could also impact export or reexport transactions. For example, the Department of the Treasury's Office of Foreign Assets Control (OFAC) also implements certain sanctions against Cuba, Iran, North Korea, Sudan, and Syria. Exporters and reexporters are responsible for complying with all applicable regulatory requirements.
US Department of Commerce: Embargoed Countries
US Department of Commerce: Country Groups
US Office of Foreign Assets Control: : OFAC Country Sanctions
US Department of State: DDTC Country Policies and Embargoes
US Department of State: ITAR 126.1 Countries