ILEC (incumbent local exchange carrier) An ILEC (incumbent local exchange carrier) is a telephone company in the U.S. that was providing local service when the Telecommunications Act of 1996 was enacted.
To call a US toll free number from Mexico, dial as follows: 800 numbers Dial 001-880-then the number 866 numbers Dial 001-883-then the number 877 numbers Dial 001-882-then the number 888 numbers Dial 001-881-then the number.o call a US toll free number from Mexico, dial as follows: 800 numbers Dial 001-880-then the number 866 numbers Dial 001-883-then the number 877 numbers Dial 001-882-then the number 888 numbers Dial 001-881-then the number.
In the United States of America, Canada, and other North American Numbering Plan countries, a toll-free telephone number is any number in these area codes:+ 1 1-800.rea code 1-899 is used in Mexico, and also, no area code in North America is currently issued with the middle digit 9 since that number is reserved in case of future expansion. These numbers are free to the caller if dialed from a land-line phone but will incur mobile airtime charges for cellular phones.