Well Dublin is structured so that the even numbers are south of the Liffey and odd numbers are north. The proposed system is tremendously confusing though and

Well Dublin is structured so that the even numbers are south of the Liffey and odd numbers are north. The proposed system is tremendously confusing though and I've no idea of the structure behind it (there is one though): http://eircode.ie/what-is-eircode http://eircode.ie/what-is-eircode