Eircom Limited, trading as Eir, is a fixed, mobile and broadband telecommunications company in Ireland, and a former state-owned monopolist. It is the largest telecommunications operator in the Republic, with a division to service the business & corporate telecom markets in Northern Ireland and Britain. As Bord Telecom Éireann, the company was state-owned until 1999, when it was floated on the Irish and New York Stock Exchanges.

Eircom Limited, trading as Eir, is a fixed, mobile and broadband telecommunications company in Ireland, and a former state-owned monopolist. It is the largest telecommunications operator in the Republic, with a division to service the business & corporate telecom markets in Northern Ireland and Britain. As Bord Telecom Éireann, the company was state-owned until 1999, when it was floated on the Irish and New York Stock Exchanges.