Examples of international areas codes

People find that the world needs to be divided and numbered for a better individual recognition.
In the phone call aspect, the world is split out in several areas. The big areas such as USA, Canada or China have a single digit number while the larger countries remaining have a two-digit number to cover each telephone company’s requirement. In the case of smaller countries, things are a little bit complex despite the low number of population. They have three digits number. To make a phone call you need to type down first a dialling code and then the phone number.