To make an international phone call you will need three numbers. The first is the number you need to dial to make an international call from that country (the access code). The second is the code for the country you're calling to (the country code) and the third is the phone number you're calling.

To dial the number you would dial your country's access code, then the country code and finally the telephone number.

For example if you were calling from the UK to Ireland with the phone number 091 xxxxxx. You would look in the table below under UK to get the access code (00). Then look under Ireland to get the country code (353). The full number is then 00 353 91 xxxxxx.