A country code on Skype is an international dialing code that represents a country. When a person wants to call an international number through Skype, he must select his country code from a drop-down list or add it manually.
Country codes are required when a person is making a telephone call to a country outside one's own; otherwise, the call cannot go through. Therefore, on Skype, the person making the call is required to enter the country code first, followed by the subscriber number. This same procedure is used when a person wants to make an international call using a mobile phone or landline.