Guide to Dialing Internationally
For those that occasionally need to make international phone calls but aren't sure how to dial the number, see the International Dialing Codes guide from timeanddate.com
Enter in your location, the location of where you are calling, and the phone number, then click on "Show Dialing Codes". The next page shows you how to dial the number. There is also a link to a world clock so you know what time it is in the country that you are calling. Very handy.
Source: DALL Blog