Six additional towns are to be added to SIRO's fibre broadband network in Cork.
Fermoy, Youghal, Bandon, Kinsale, Mitchelstown and Passage West had previously not been on the telecom company’s roadmap.
The new additions will bring to eight the number of towns in Cork that will be connected to the fibre network this year.
Overall, SIRO plans to invest more than €125m in Cork, €25m than had originally planned.
"Today’s announcement is good news for towns across Cork many of whom have had to endure poor connectivity until now," said SIRO CEO John Keaney.
"The arrival of SIRO’s full fibre broadband to towns across Cork will bring them new opportunities and safeguard their future."
"Having access to SIRO’s reliable and resilient broadband, with speeds of up to 2 Gigabits for homes and up to 10 Gigabit for businesses, ensure people and communities can live and work locally, run their businesses and stay connected with ease."
Six years ago SIRO began rolling out its fibre broadband network in Cork and in the interim it has brought it to over 60,000 premises or 162,000 people living in Cork.
The service is already live in Mallow, Skibbereen, Carrigaline, Carrigtwohill and Little Island.
The additional eight towns being added this year will see the service available to 20,000 further premises or 55,000 people.
"SIRO’s work in 2023 will expand our footprint in Cork this year even further," said Mr Keaney.
"And beyond that, we are already looking ahead to more areas in Cork."
Nationally SIRO is investing €1 billion overall in building its fibre broadband network across 154 towns and cities.
So far it has brought its network to almost 480,000 homes and businesses in over 126 cities and towns and is on track to reach 770,000 premises or 2.2 million people by 2026.
"Creating a fully connected Ireland is a key priority for Government and it is only possible through partnership between public and private investment working together," said Minister for Finance, Michael McGrath.