The US has implemented financial sanctions against countries, regimes, individuals, and companies. Comprehensive sanctions – often referred to as ‘country wide sanctions’- are in place against Iran, Syria, Sudan, Cuba, and North Korea.
Specific individuals and companies that have been identified as connected with those activities, or with terrorism or narcotics, are identified on the ‘Specially Designated Nationals’ (SDN) list maintained and published on OFAC’s website.
Jurisdiction under OFAC sanctions usually extends to ‘US persons’, which is generally defined as:
any US citizen or permanent resident overseas national, wherever situated in the world