The postal district system was introduced in 1917 by the British government, as a practical way to organise local postal distribution. This followed the example of other cities, including London, first subdivided into ten districts in 1857, and Liverpool, the first city in Britain or Ireland to have postcodes, from 1864.
Either enter a postal code (eg. "9011", "AB1", "9980-999") or a city (eg. "London")
It corresponded to Dublin postal districts: Dublin 1 is 101, etc., except for Dublin 10 and Dublin 20, both of which had the same code 110, and Dublin 6W, which was 126. Cork had codes for four each of the delivery offices, Ballinlough (901), North City (902), Little Island (903), and South City (903). Utility issues
This map shows the postal districts in and around Dublin City. In the Republic of Ireland, each property has a unique 7-digit code known as an Eircode. In Dublin City, the first three characters of a property’s Eircode is “D” followed by the postal district number, e.g. “D01” for Dublin 1 or “D18” for Dublin […]
Postcodes for Ireland, Ireland. Use our interactive map, address lookup, or code list to find the correct zip code for your postal mails destination.
Areas of Dublin had numbered postal districts, but other than that, Irish addresses were based on names of towns, townlands, villages, cities, and counties. In 2015 a new national postcode system called Eircode was launched, giving every residential and business address in Ireland a unique postal code called an Eircode.
For this reason, until 2015, it was far from easy to get away in rural Ireland. Ireland remains the only country in the European Union, which until 2015 did not have a unified postal system. Exception for large cities such as Dublin and Cork, so far no country code is used in rural areas.