How do You Call An American Cell Phone From Ireland? (Area Codes)?

Question

Is There A Specific Code To Use when Calling an American Cell Phone From An Irish One? Or I there are any other ways of calling without the code?

Answer 1

You dial 011 + 1 + the area code and the number of the mobile, or house line.  

Answer 2

You do not dial 011

From an Irish mobile (example)

[phone]

+1 for the country code

212 is area code

555 7777 is number