Customers of Three broadband in North Kerry are complaining of issues with their service.
Radio Kerry has received calls from Brosna, Knocknagoshel and Listowel complaining of no broadband coverage.
In a statement Three says it is aware that some customers may be experiencing service issues and has apologised to those affected.
It has asked those affected to log onto their website (www.three.ie/mbb) or call customer care on 1913.
The company is currently investing 300 million euro in its network.