N5X is a Forward Sortation Area Code (FSA), It is located in Fanshawe / Stoneybrook / Stoney Creek / Uplands / East Masonville London in Ontario, Canada. FSA is a geographical region in which all postal codes start with the same three characters. N5X is an Urban FSA code. The main area code of the area of N5X is 519 226 548. There are about 697 postal codes.