Dial 9 (off campus number) — 011 (to reach someone outside of the U.S.) - country code - city code - local phone number
- Numbers from abroad may include a zero as the first number. You generally need to drop the initial zero.
- In other cases, you may need to add numbers. For example, in Mexico City the local number is 7 digits long. When calling that number from outside of Mexico, add an additional '5' in front of the local number to make that number 8 digits long.