Even though 90% of all land line telephone service and 80% of the cell phone service in Mexico is ultimately controlled by the same person (Carlos Slim), dialing other numbers is bizarre and confusing. Here are the FIFTEEN RULES you need to memorize if you want to call to and from Mexico.

Making Local calls in Mexico (same area code to same area code)

Making long distance calls in Mexico

Calling the USA from Mexico

Calling USA toll-free numbers from Mexico

Calling Mexico from the USA

NOTE: Area codes in Mexico are always 3 digits long except in Mexico City, Guadalajara and Monterrey where the area code is 2 digits long and the telephone number is 8 digits long!