About ESB
Our history, our people and our principles
Electric Ireland
We manage your electricity and gas supply accounts, promoting energy efficiency and helping you save money.
ESB Networks Ltd.
We maintain Ireland's electricity network, manage its network infrastructure and operate ESB's electricity meters.
ESB International
We are an international energy company investing in energy and engineering across the globe.
ESB Telecoms
We built and own Ireland's national fibre optic network, and over 300 telecoms sites across Ireland.
ESB limited companies
Our registered office and the list of registered numbers for all ESB companies.