What is the country code for Quebec?

Québec is not a country, it is a province of Canada.

Canada's telephone country code is +1, the same as the USA. The internet domain for Canada is .ca; websites specifically about Québec may be located in the .qc.ca subdomain.

(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)