ISD codes - International subscriber dialing Codes
Article page |
Health page |
This is a list of country calling codes also called IDD (International Direct Dialling) or ISD (International Subscriber Dialling) codes.
The telephone numbering plan for a telephone system includes an international dialing prefix, such as "00" or "011", which is added before the country calling code and is specific to the country from which the caller is dialling. Generally, as in the list below, the need for this prefix is specified with a "+".
Zone 1 North American Numbering Plan Area
Countries within NANP (North American Numbering Plan) administered areas are assigned area codes as if they were all within one country. The codes below in format +1 XXX represent area code XXX within the +1 NANP zone not a separate country code.
The North American Numbering Plan Area includes:
Zone 2 Mostly Africa
(but also, for example Aruba, Faroe Islands and Greenland)
Zones 3/4 Europe
Originally larger countries, such as the United Kingdom or France, were assigned two-digit codes (to compensate for their usually longer domestic numbers) and small countries, such as Iceland, were assigned three-digit codes; however, since the 1980s, all new assignments have been three-digit regardless of countries populations.
Zone 5 Mostly Latin America
Zone 6 Southeast Asia and Oceania
Zone 7 Eurasia (former Soviet Union)
Zone 8 East Asia and Special Services
Zone 9 Central, South and Western Asia
( Courtesy: Wikkipedia)