Close to 6,000 properties are set to be connected.
Almost 5,900 properties across Offaly are set to become connected to high-speed fibre broadband.
National Broadband Ireland has been carrying out the works as part of the Government's National Broadband plan.
Homes and businesses in Banagher and Ferbane can now connect to the network - it also includes areas near Croghan, Kilclonfert and Tyrellspass.
Network builds are still ongoing on over an additional thousand homes in the county.
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