The number of digits in a phone number depends on the county of the number itself. For instance, in the United States, there are typically 10 digits for a number, whether it has an area code or is toll free.
Telephone numbers throughout Russia are uniformly 3 digits for the area code plus 7 digits for the local number.
In the US and Canada, telephone numbers have 10 digits, including the area code. Other countries use phone numbers with different numbers of digits.
Three digit area code followed by seven digits for the subscribers number.
hi , the size of an Egyptian phone number range from 10 digits in mobile network & cairo area and 8 digits in many governorate
011 (out of USA) 47 (Norway) XXXXXXXX (Norwagian phone number)
In the US and Canada, 10 digits because there is three for the area code then seven other digits. In other countries as few as 3 or 4 or as many as 11 or perhaps 12.