Hi. 
I need to make a phone call from the U.S. to the U.K.. Having made only one international call in my life--and that several years ago-- I'd like to verify that I'm going to do it correctly. Any help will be greatly appreciated!
The number I was provided with (X's in place of numbers for security, no dashes) is: XXX XXXX XXXX. Would this be the city code plus the actual number? Am I right to think, then, that I should dial the following:
011 44 XXX XXXX XXXX
???
Thanks so much!
*edited because I accidentally typed "001" instead of "011"

I need to make a phone call from the U.S. to the U.K.. Having made only one international call in my life--and that several years ago-- I'd like to verify that I'm going to do it correctly. Any help will be greatly appreciated!
The number I was provided with (X's in place of numbers for security, no dashes) is: XXX XXXX XXXX. Would this be the city code plus the actual number? Am I right to think, then, that I should dial the following:
011 44 XXX XXXX XXXX
???
Thanks so much!

*edited because I accidentally typed "001" instead of "011"