[header] How to make a phone call to mexico [title] Find your international exit code. [step] Every country has its own unique exit code. This is the number that you must dial first, in order to place a call outside of the country you are calling from. 
If you are making a call from the united states, your exit code would be 011, while if dialing from argentina, you would use 00 to place a call out of the country. [substeps] To find your country's exit code, you can run a simple search through your favorite online search engine.