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 To call a Mexican cell phone from a land line, simply follow the mobile country code dialing instructions above to place your call. 2  To call a Mexican cell phone from your cell phone, you may need to first use the + (plus) sign prior to entering the Mexico mobile code and telephone number.1  To call a Mexican cell phone from a land line, simply follow the mobile country code dialing instructions above to place your call. To call a Mexican cell phone from your cell phone, you may need to first use the + (plus) sign prior to entering the Mexico mobile code and telephone number. 2  If you are calling Mexico from your cell phone, you may incur additional charges or fees from your mobile carrier.