2RN is the trading name of RTÉ Transmission Network DAC, a wholly owned subsidiary of Raidió Teilifís Éireann, formerly trading as RTÉNL, which runs Ireland's principal digital terrestrial television and radio broadcast networks. In December 2002 it became an incorporated company and subsidiary of RTÉ, it was previously a division within RTÉ. It operates 12 main TV and radio transmitter sites and many smaller relays and transposers, which carry television and/or radio. It also provides site hosting for mobile telephone operators, the emergency services, wireless broadband and other private mobile communications service providers.

In April 2013 a repositioning was carried out to provide "arm's length" broadcast transmission services to all national TV and radio broadcasters. The repositioning renamed and rebranded RTÉNL to 2RN (the name comes from the original Irish Radio service known as 2RN. A new board of directors was appointed with an independent chairman and its headquarters was located in Tallaght, across the city from its owner's campus at Donnybrook in Dublin.