International call prefix

An international call prefix, international dial-out code or international direct dial code (IDD code) is a trunk prefix that indicates an international phone call. In the dialling sequence, the prefix precedes the country calling code (and, further, the carrier code, if any, and the destination telephone number).

It has been suggested that this article be merged into International direct dialing. (Discuss) Proposed since January 2023.

This article relies excessively on references to primary sources. (May 2022)

The international call prefix is part of the telephone numbering plan of every country.