Below is a list of links to the Office of Foreign Assets Control's Specially Designated Nationals and Blocked Persons list, the Bureau of Industry and Security's Denied Parties List, the Entry List and the Office of Defense Trade Controls' Debarred Persons Lists.
Each agency is responsible for maintaining and updating their respective lists. Companies, entities, and persons found on the lists are sanctioned by the U.S. government and may not export goods from the United States or receive exported goods from the United States. Exporters are responsible for ensuring that all export transactions are properly authorized.
Exporters are advised to check the Federal Register publication and each agency's web site routinely for changes to the above mentioned lists. Export sanctions, written by the appropriate agency, are published in the Federal Register and are the official source of information about denied persons, Specially Designated Nationals (SDN) or debarred parties.
See Also - on the web:
The Bureau of Industry and Security - Denied Persons List and Entity List
The Office of Foreign Assets Control - Special Designated Nationals and Blocked Person List
The Directorate of Defense Trade Controls - Debarred Parties List
The U.S. Government Printing Office - Federal Register