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What is the full form of ISD

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ISD: International Subscriber Dialing

ISD stands for International Subscriber Dialing. It is also known as International Direct Dialing (IDD). This term describes an International telephone call made by a person without relying on the telephone operator.

ISD is assigned to every country. It is a specific number. A subscriber has to add this code before the individual’s phone number to make any international call.

Other Full Forms of ISD

• ISD: International Society of Dermatology
• ISD: Indiana School for the Deaf
• ISD: International School of Design
• ISD: International School Dhaka
• ISD: Instructional System Design