The Communications Minister will launch Ireland's first national post code service today.
Two point two million homes and businesses across the country will be assigned an individual 7 digit 'Eircode' which they will receive in the post in the coming weeks.
The optional service has cost over 20 million euro and is aimed at reducing confusion surrounding non-unique addresses.
An Irish post code service was first proposed over a decade ago.
Dublin's codes will start with the letter D, with current postcodes like Dublin 1 becoming D01.
Cork City is expected to get the letter T while Galway to get H.
The Eircode system will be optional so homes don't have to use their codes if they don't want to and it won't eliminate any existing lines in addresses.
People can check their code on eircode.ie.
