How do i dial a number from London?? The number is [phone] how would i dial that in America??

Question

Ummm I need some one with some phone service experience. I am trying to call someone that lives in London and when i try to dial the number it has to operater thing come up saying it cannot dial the number and i screwed up. How would i dial this number??

Answer 1

Dial 011 44 20 7470 4000

Answer 2

I think you just dial 001 then the number you have.