OFAC administers a number of U.S. economic sanctions and embargoes that target geographic regions and governments. Some programs are comprehensive in nature and block the government and include broad-based trade restrictions, while others target specific individuals and entities. (Please see the “Sanctions Programs and Country Information” page for information on specific programs.) It is important to note that in non-comprehensive programs, there may be broad prohibitions on dealings with countries, and also against specific named individuals and entities. The names are incorporated into OFAC’s list of Specially Designated Nationals and Blocked Persons ("SDN list") which includes approximately 6,400 names of companies and individuals who are connected with the sanctions targets. In addition, OFAC maintains other sanctions lists that may have different prohibitions associated with them. A number of the named individuals and entities are known to move from country to country and may end up in locations where they would be least expected. U.S. persons are prohibited from dealing with SDNs wherever they are located and all SDN assets are blocked. Entities that a person on the SDN List owns (defined as a direct or indirect ownership interest of 50% or more) are also blocked, regardless of whether that entity is separately named on the SDN List. Because OFAC's programs are dynamic, it is very important to check OFAC's website on a regular basis to ensure that your sanctions lists are current and you have complete information regarding the latest restrictions affecting countries and parties with which you plan to do business.