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ISD Full Form

ISD Full Form in Telecom

What is the full form of ISD

Full form of ISD in English: International Subscriber Dialing, also known as International Direct Dialing (IDD). A person who can make an international telephone call without relying on a telephone operator uses this term.

All countries are provided with ISD. This is a special number. A subscriber needs to add this code before the person’s phone number to make any international call.

The special number or code must be added before the telephone number of the person to make an international call. Most international calls are dialed directly since the 20th century. When writing telephone numbers for international purposes, the international call prefix is ​​ignored and the number must begin with a plus sign (+) along with the national calling code.

A plus sign indicates that the country code follows, and there might be a confirmation code to dial in the country of origin.

ISD Code List

Country ISD Code
India +91
Iran +98
Iraq +964
Mexico +52
Monaco +377
Myanmar  +95
Nepal  +977
New Caledonia +687
New Zealand +64
Oman +968
Pakistan +92
Peru  +51
Portugal +351
Qatar  +974
Russia +7
Saudi Arabia +966
South Africa +27
Spain +34
Sri Lanka +94
Sweden +46
Switzerland +41
Thailand +66
Turkey +90
Ukraine +380
United Arab Emirates +971
United Kingdom +44
United States  +1
Yemen  +967

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FAQs :

What are ISD and STD?

STD: Stands for Subscriber Trunk Dialing. It was called when subscribers made long-distance calls without the help of operators. ISD: Stands for International Subscriber Dialing.

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What is the ISD of India?

+91 is the India's ISD Code.


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