Country codes are short alphabetic or numeric geographical codes developed to represent countries and dependent areas, for use in data processing and communications. Several different systems have been developed to do this. The best known of these is ISO 3166-1.

Is the US country code 001?

All Country Codes used in the world

For example, 001 is the country code of USA, 007 is the country code of Russia, 031 is the country code for the Netherlands, 0091 is the country code for India, etc.

What is the country code Australia?

The Australian country code is 61. When calling from outside Australia, leave out the leading '0' from the STD area code or from the mobile telephone number. The outgoing IDD access code from within Australia is 0011.