Dublin 4 is a postal district of Dublin, Ireland including Baggot Street Upper and the suburbs of Ballsbridge, Donnybrook, Irishtown, Merrion, Ringsend (including South Lotts and parts of Grand Canal Dock) and Sandymount, on the South side of Dublin. Most of the area was known as Pembroke Township until 1930 when it was absorbed by the City and County Borough of Dublin. Under Ireland's Eircode system the postcode is now rendered D04.