[1][2] Under the Eircode system, the city is covered by the original routing areas D01 to D24, along with A## and K## codes for locations elsewhere in County Dublin.

The borders of Dublin 2 are the Liffey in the north, the Grand Canal to the south and east and Aungier, Wexford and Camden Streets to the west.

Dublin 7 includes Arbour Hill, some parts of Ashtown, Broadstone, Cabra, Grangegorman, Oxmantown, Phibsborough, Smithfield, Stoneybatter.

Dublin 8 includes Dolphin's Barn, Inchicore, Islandbridge, Kilmainham, Merchants Quay, Portobello, South Circular Road, the Phoenix Park and the Liberties.

[5] Dublin 9 includes parts of Ballymun east of Ballymun Road (Shangan and Coultry), Beaumont, Donnycarney, Drumcondra, Elm Mount, Griffith Avenue, parts of Glasnevin (St Mobhi, Botanic Gardens and Met Éireann), Santry, and Whitehall.

Dublin 12 includes Bluebell, Crumlin, parts of Terenure, Kimmage, Drimnagh, Greenhills, Perrystown and Walkinstown.

Dublin 14 includes Churchtown, Clonskeagh, most of Dundrum, Goatstown, lower Rathfarnham and Windy Arbour.

Dublin 15 includes Ashtown, Blanchardstown, Castleknock, Coolmine, Clonsilla, Corduff, Mulhuddart, Tyrrelstown, and Ongar.

This leads to a mailing quirk whereby the town's addresses could be verbalised as ending with, "County Meath, Dublin 15".Dublin 16 includes Ballinteer, Ballyboden, parts of Dundrum, Kilmashogue, Knocklyon, upper Rathfarnham and Rockbrook.

Dublin 18 includes Cabinteely, Carrickmines, Cherrywood, Foxrock, Loughlinstown, Kilternan, Sandyford, Shankill, Ticknock, Ballyedmonduff, Stepaside, and Leopardstown.

Notable locales include Blackrock, Dún Laoghaire, Malahide, Swords, Lucan, Rush and Balbriggan.

Successive Ministers for Communications since 2005 announced plans to introduce a full postcode system across the state.

[14][15][16] On 8 October 2013, Minister for Communications, Energy and Natural Resources, Pat Rabbitte announced a postcode system for the entire country.