In this quiz you will lear about telephone area codes (aka STD or dialing codes), along with the major towns. This is a list of country calling codes or dial in code defined by ITU-T recommendations E.123 and E.164, also called IDD (International Direct Dialling) or ISD (International Subscriber Dialling) codes. The dial plan of a telephone network usually designates a special trunk access prefix code, the international dialing prefix, which must be dialed before the country calling code to select access to the international circuits of the network. The prefix is specific to the country from which the caller is dialing, but often it is 00 or 011. Generally, a user must consult local directories for the access code if a number is listed beginning with a plus sign, which means the digits following it are a country calling code.
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