Is it all of those or just one? Having never made an international call, I'm at a loss as to how to write my number down. Does the local area code go in parentheses? Or does the country code? Help, oh ye more sophisticated world phoners![/quote]
The formula is +country code area code your phone number. You don't need any parentheses.
The + stands for whatever prefix you have to make to dial internationally, which will be different in different countries. It's 00 in the UK but you don't need to indicate that.
So suppose you wanted to write the number of the White House switchboard down for someone in the UK, it would look like this:
+1 202 456 1414
What they would actually dial would be 00 1 202 456 1414.
