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.
1 011 - US exit code; dial first for international calls made from the USA or Canada. 2  Phone Number (may not begin with 01, 044 or 045) - 10 digits, area code included. 3  sample call from US to a landline in Mexico City: 4  add digit 1 after 52.alling Mexico from the United States explained: 1  011 - US exit code; dial first for international calls made from the USA or Canada. 2  Phone Number (may not begin with 01, 044 or 045) - 10 digits, area code included.