The en dash is usually used. From Wikipedia: The en dash (–) and en space ( ) are each one en wide. In English, the en dash is commonly used for inclusive ranges (e.g., "pages 12 – 17" or "August 7, 1988 – November 26, 2005"), and increasingly to replace the long dash ("—", also called an em dash). (Note that when using it to replace a long dash, spaces are needed either side of it – like so.)
– Edwin AshworthApr 27 '15 at 07:18