The organisation is apologising for the inconvenience, and has given assurances calls will be diverted to the regional office.
A midlands citizen's information centre has temporarily closed following a Covid-19 outbreak.
Staff in the Athlone service started to feel unwell late last week and were testing on a daily basis.
Telephones will be diverted to the regional office.
Citizens Inforamtion Athlone is apologising for the inconvenience.