ILEC

abbreviationStandard termTelecom & IT

The established regional telephone company that owned the original copper wire monopoly before market deregulation.

ILEC stands for incumbent local exchange carrier. It designates the traditional telecommunications operator that historically held a regional monopoly on landline services and physical copper infrastructure. Following deregulation, these legacy companies were required to lease their lines and facilities to newer competitors at wholesale rates.

Heard on the job

We've to wait on the ILEC to dispatch a tech before we can light up the new fiber at that address.

Insider tip

In the US, ILECs are typically the former Baby Bells or large independent telcos like CenturyLink.

Do not mix it up with

  • CLEC: An ILEC is the original monopoly telephone company, while a CLEC is a newer competitor that often leases lines from the ILEC.