A Phone Prefix is the first
set of digits of a telephone number; in the North American Numbering Plan
countries (country code 1), it is the first three digits out of a seven-digit
phone number. It shows which exchange the remaining numbers refer to.
Some countries share an international call prefix and
some countries have their own unique code.
The most common call prefix is ”00” because it was set
as a standard by the International Telecommunications Union.
Not all countries, however, have adopted this as their
international call prefix.
Also, some countries have a separate international call
prefix for VoIP service .
This means that if you are calling from a voice over
Internet protocol, you would use a different prefix than if you were dialing
from a fixed phone or mobile phone.
Since not all countries use the same prefix, below is
a list of countries and their corresponding call prefixes.
