I believe DVD regions go something like:
Region 0 - non-regionalised (i.e. plays on any player)
Region 1 - North America
Region 2 - Europe, Japan, Egypt, Arabia, South Africa
Region 3 - South-east Asia
Region 4 - Central + South America, Australia, New Zealand
Region 5 - India, Russia, Africa, former USSR countries
Region 6 - China
Region 7 - unused
Region 8 - Airlines, cruise ships
Region 9 - spare
http://hometheaterinfo.com/dvd3.htm