An interval international phone number, also known as an IDD (International Direct Dialing) code, is a numerical prefix added to the beginning of a phone number to enable calls between different countries. For example, the IDD code for the United States is “011”, so to call a number in the US from the UK, the number would be dialed as “011 1 212 555 1212” (where “1” is the country code for the US and “212” is the area code for New York City).
Interval international phone numbers are essential for global communication, allowing individuals and businesses to connect with each other across borders. They facilitate trade, tourism, and diplomatic relations, and have played a vital role in the globalization of the economy. The introduction of IDD codes in the mid-20th century revolutionized international calling, making it faster, easier, and more affordable.
