Dublin 4, also rendered as D4 and D04, is a historic postal district of Dublin, Ireland including Baggot Street Upper, the southernmost fringes of the Dublin Docklands, and the suburbs of Ballsbridge, Donnybrook, Irishtown, Merrion, Ringsend (including South Lotts and parts of Grand Canal Dock) and Sandymount, on the Southside 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.