DVD Region Codes
DVD region codes is a provision in the DVD Specification that requires DVD players to be hard-coded to accept DVDs that is only meant to be played within one of six designated world regions. A Code 1 disc cannot be played in a Code 3 DVD player for example. This technique was developed to enable Hollywood companies to release movies at different times in different regions.
DVD regions are defined as:
Region 1 - 1: U.S., Canada, U.S. Territories
Region 2 - Japan, Europe, South Africa, and Middle East (including Egypt)
Region 3 - Southeast Asia and East Asia (including Hong Kong)
Region 4 - Australia, New Zealand, Pacific Islands, Central America, Mexico, South America, and the Caribbean
Region 5 - 5: Eastern Europe (Former Soviet Union), Indian subcontinent, Africa, North Korea, and Mongolia
Region 6 - Peoples Republic of China
Region 7 - Reserved
Region 8 - Special international venues (airplanes, cruise ships, etc.)