1. A communications common carrier authorized to provide interexchange telecommunications services within world zone 1 using the North American numbering plan. 2. A telecommunications common carrier authorized to provide telecommunications services between LATAs. Note: The term "interexchange carrier" is also used to refer to any other entity that connects to the exchange access network at a point of termination (POT. ) 3. A carrier that provides connections between LATAs, where the calling or called customer is located in the United States. Note: This definition has no Canadian equivalent. However, the term "interexchange carrier" is used in the context of a carrier that provides connections extending across borders to carriers in the United States. Synonyms carrier, common carrier, commercial carrier, communications carrier.