From Wikipedia
In the United States, Dr Pepper Snapple Group does not have a complete network of bottlers and distributors, so the drink is sometimes bottled under contract by Coca-Cola or Pepsi bottlers. Prior to the initial Cadbury Schweppes investment-turned-buyout, 30% of Dr Pepper/Seven Up products were produced and distributed by Pepsi bottlers, and another 30% by Coca-Cola bottlers. The remaining 40% were produced and distributed by independent bottlers (mainly consisting of Dr Pepper/Seven Up premerger regional bottlers) and the Dr Pepper/Seven Up Bottling Group. Currently, the majority of Pepsi and Coke bottlers bottling Dr Pepper are owned by PepsiCo and The Coca-Cola Company after their buyouts of their major bottlers.
Presently, Dr Pepper Snapple relies on its own bottling group to bottle and distribute its products in more than 30 states. Coca-Cola and Pepsi have essentially stopped bottling and distributing CSAB products in favor of in-house alternatives, although regional exceptions can be found.[41]
In Canada and Poland, Cadbury-Schweppes has licensed distribution rights to PepsiCo. In Mexico, Germany, Sweden, the Netherlands, Slovakia, Finland, Austria, Czech Republic, Belgium, and Norway, Cadbury-Schweppes owns the trademark and distributes the product. In Romania, it can be found only in larger cities, imported from Belgium. In Portugal, Spain, France, Turkey, and Greece, it is almost impossible to find, as it is usually imported from the United Kingdom in particular supermarkets. In almost all of the other countries of the world, the Coca-Cola Company purchased the trademark from Cadbury-Schweppes and distributes the product. This mixed worldwide ownership of the trademark is due to antitrust regulations which prevented Coca-Cola from purchasing the rights everywhere. Dr Pepper is also available in Russia, South Korea and Ukraine. Although no longer locally bottled in Australia or New Zealand, Dr Pepper is imported and sold by United States Foods, and many other small retailers in Australia, with the UK (sugar) version sold in the British sections of Coles and Woolworths supermarkets. Dr Pepper is not available in Thailand, Italy, North Korea and Serbia. It is rarely sold in the Philippines, Indonesia, Malaysia and Singapore, as it is imported from the United States.
Dr Pepper has been sold in Japan since 1973 and is widely available in greater Tokyo, Okinawa and parts of the Tōkai region, where it is distributed by local Coca-Cola bottlers. It is not actively marketed in other regions of Japan; Coca-Cola’s Osaka bottler began selling Dr Pepper in 1983, but pulled the product two years later due to low sales.