Incumbent Local Exchange Carrier (ILEC)
An incumbent local exchange carrier (ILEC) is a telephone company that has been in existence prior to the divesting of AT&T. The term ILEC is also used in reference to the Baby Bells, which are the regional telephone companies that were created when AT&T was divided. The largest ILECs are Verizon, AT&T, CenturyLink and Frontier.… Read More
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