Do I include the leading ‘8’ in a phone number?

In most countries of the world, a leading ‘8’ is used in the call sequence.

In Russia, Kazakhstan, BelarusLithuania, Azerbaijan, Turkmenistan, Uzbekistan, TajikistanAbkhazia, and South Ossetia, the leading ‘8’ in a phone number is called a ‘trunk prefix’ – it is used to notify the circuits of the telephone network that the number being called is in another region of the country.

It is similar in function to a leading ‘0’ that is used in many countries in Europe, Asia, and Africa, and the leading ‘1’ that is used within the North American Numbering Plan (NANP).