The first three characters of your new post code (your Eircode) is called the routing key. This is an area code that identifies which part of the country you live in. Eircode has not published the list of routing keys yet or stated if it ever will. So I’ve put together a quick list of Irish towns with their routing keys for your future reference.
Eircode says there are 139 routing keys. I count 34 in Dublin so that leaves 105 for the rest of the country. That means each county gets an average of just 4 routing keys. So the areas are too large to be very useful for narrowing down a location. The routing keys have been chosen to match An Post’s existing distribution system. Some routing keys cross county boundaries.
I would be very grateful if you could let me know of any codes I am missing or of any mistakes I may have made in compiling this list. Just leave a comment at the end.
Eventually I should have enough information to make a map showing the routing key boundaries. Here is a link to a map being made elsewhere: crowdsourced routing key map
You can download a copy of the technical specs for Eircode here:
Boundary maps of A94, A96 and D18 areas:
A94 Map
A96 Map
D18 Map
Gamma, an Irish company that provides Eircode services, has made a complete map of the routing key boundaries. You can see it here:
http://www.gamma.ie/sites/default/files/RKDraft.pdf
Here’s a fragment of Gamma’s map for Dublin:
| Eircode Routing Keys | ||||
| Send errors and omissions to @smytho | ||||
| A41 | Ballyboughal | |||
| A42 | Garristown | |||
| A45 | Oldtown | |||
| A63 | Greystones | |||
| A67 | Wicklow | |||
| A75 | Castleblayney | |||
| A81 | Carrickmacross | |||
| A82 | Kells | Kingscourt | Virginia | |
| A83 | Enfield | Summerhill | Rathmoylon | |
| A84 | Ashbourne | |||
| A85 | Dunshaughlin | |||
| A86 | Dunboyne | |||
| A91 | Dundalk | |||
| A92 | Drogheda | Ardee | Dunleer | |
| A94 | Blackrock | Monkstown | Booterstown | Stillorgan |
| A96 | Dun Laoghaire | Dalkey | Sallynoggin | Glenageary |
| A98 | Bray | Kilmacanogue | Roundwood | |
| C15 | Trim | Navan | Athboy | |
| D01 | Dublin 1 | |||
| D02 | Dublin 2 | |||
| D03 | Dublin 3 | |||
| D04 | Dublin 4 | |||
| D05 | Dublin 5 | |||
| D06 | Dublin 6 | |||
| D6W | Dublin 6W | |||
| D07 | Dublin 7 | |||
| D08 | Dublin 8 | |||
| D09 | Dublin 9 | |||
| D10 | Dublin 10 | |||
| D11 | Dublin 11 | |||
| D12 | Dublin 12 | |||
| D13 | Dublin 13 | |||
| D14 | Dublin 14 | |||
| D15 | Dublin 15 | |||
| D16 | Dublin 16 | |||
| D17 | Dublin 17 | |||
| D18 | Dublin 18 | |||
| D20 | Dublin 20 | |||
| D22 | Dublin 22 | |||
| D24 | Dublin 24 | |||
| E21 | Cahir | |||
| E25 | Cashel | |||
| E32 | Carrick on Suir | |||
| E34 | Tipperary | |||
| E41 | Thurles | Templemore | ||
| E45 | Nenagh | |||
| E53 | Roscrea | |||
| E91 | Clonmel | Fethard | ||
| F12 | Knock | Swinford | Claremorris | |
| F23 | Castlebar | |||
| F26 | Ballina | Bangor | ||
| F28 | Westport | Achill | ||
| F31 | Ballinrobe | |||
| F35 | Ballyhaunis | |||
| F42 | Roscommon | |||
| F45 | Castlerea | Glenamaddy | ||
| F52 | Boyle | |||
| F56 | Ballymote | |||
| F91 | Sligo | Manorhamilton | Tubbercurry | |
| F92 | Letterkenny | |||
| F93 | Lifford | Carndonagh | ||
| F94 | Bundoran | Donegal | ||
| H12 | Cavan | |||
| H14 | Belturbet | |||
| H16 | Cootehill | |||
| H18 | Monaghan | |||
| H23 | Clones | |||
| H53 | Ballinasloe | Portumna | ||
| H54 | Tuam | |||
| H62 | Loughrea | |||
| H65 | Athenry | |||
| H71 | Clifden | |||
| H91 | Galway | Spiddal | Headford | Ballyvaughan |
| K32 | Balbriggan | |||
| K34 | Skerries | |||
| K36 | Malahide | Donabate | ||
| K45 | Lusk | |||
| K56 | Rush | |||
| K67 | Swords | |||
| K78 | Lucan | |||
| N37 | Athlone | Moate | ||
| N39 | Longford | Ballymahon | Granard | Lanesborough |
| N41 | Carrick On Shannon | |||
| N91 | Mullingar | Kinnegad | ||
| P12 | Macroom | |||
| P14 | Crookstown | |||
| P17 | Kinsale | |||
| P24 | Cobh | |||
| P25 | Midleton | |||
| P31 | Ballincollig | |||
| P32 | Rylane | |||
| P36 | Youghal | |||
| P43 | Carrigaline | |||
| P47 | Dunmanway | |||
| P51 | Mallow | Rathmore | Cappoquin | |
| P56 | Charleville | |||
| P61 | Fermoy | Rathcormac | ||
| P67 | Mitchelstown | |||
| P72 | Bandon | |||
| P75 | Bantry | Glengarriff | ||
| P81 | Skibbereen | Baltimore | ||
| P85 | Clonakilty | Rosscarbery | ||
| R14 | Athy | |||
| R21 | Bagenalstown | |||
| R32 | Portlaoise | Abbeyleix | Portarlington | |
| R35 | Tullamore | Walsh Island, Offaly | ||
| R42 | Birr | Banagher | ||
| R45 | Edenderry | |||
| R51 | Kildare | |||
| R56 | Curragh | |||
| R93 | Carlow | Tullow | ||
| R95 | Kilkenny | Graiguenamanagh | Thomastown | |
| T12 | Cork city southside | Mahon | Passage West | |
| T23 | Cork city northside | Hollyhill | ||
| T34 | Carrignavar | |||
| T45 | Glanmire | Carrigtwohill | ||
| T56 | Watergrasshill | |||
| V14 | Shannon | |||
| V15 | Kilrush | Kilkee | ||
| V23 | Caherciveen | |||
| V31 | Listowel | |||
| V35 | Kilmallock | |||
| V42 | Newcastle West | |||
| V92 | Tralee | Dingle | ||
| V93 | Kenmare | Killarney | ||
| V94 | Limerick | Abbeyfeale | Newport | Killaloe-Ballina |
| V95 | Miltown Malbay | Ennis | Kildysart | |
| W12 | Newbridge | |||
| W23 | Maynooth | Celbridge | Leixlip | |
| W34 | Monasterevin | |||
| W91 | Naas | Blessington | ||
| X35 | Dungarvan | |||
| X42 | Kilmacthomas | Bunmahon | ||
| X91 | Waterford | Dunmore East | Tramore | |
| Y14 | Arklow | |||
| Y21 | Enniscorthy | Bunclody | ||
| Y25 | Gorey | |||
| Y34 | New Ross | Fethard On Sea | ||
| Y35 | Wexford | Rosslare | ||
Well done with compiling the list!
One suggestion – T12 seems to cover Cork city centre as well as Mahon.
It would be great to see a map of the codes. I started one based on An Post’s interactive map at
https://www.anpost.ie/AnPost/AnPostDM/Tools/Publicity+Post+Map/
However I’ve only got as far as the North East and don’t really have the time to complete it nationally: http://dropcanvas.com/eje73/1
I guess they are trying to maximise their licence fee revenue by keeping as much info from the public domain…
To A98 add Roundwood
Congrats on starting this. I don’t know why Eircode don’t just publish a map as one can be deduced through trial and error.
Attempting to detect the boundaries, I have the following:
Foster’s Avenue A94
Deerpark Road Mount Merrion A94
Mount Anville Road D14
Roebuck Road D14
Ardlui Park (top of Newtownpark Ave) A94
Foxrock Park D18
Thanks Deryck, Andrew and John. Changes made.
I notice that the Dublin postcode doesn’t always match the routing key. For example, Loughlinstown Hospital (St Columcille’s) has been assigned eircode D18 E365, yet its address is Co Dublin.
The basic data linking eircodes with map co-ordinates should be freely available – as they are in the UK.
I did up some maps of the boundaries of the routing key areas near my home. This was easy when it turned out that each of these areas comprises a number of An Post publicity post districts. I checked a large sample of eircodes along the borders before trusting these maps.
It would be nice to turn these boundary maps into vectors and upload them to OpenStreetMap.
Well done this should be available free of charge from the company. Many small enterprises would benefit by having it available. There also would be a better chance that it would be used if the rules were widely known
IT Consultant
W23 is Naas/Straffan and maybe more…
Dear sir T12 is massive It goes to Inishannon and Fivemilebridge and Ballygarvan To the east of that is P43 Carrigaline to Crosshaven T12 includes Ballinhassig to Iniscarra and to Passage west and Monkstown P 43 is to the south The northern boundary of T12 is the north channel of the River Lee That means Cork city centre. T23 is the whole of Cork city north of the n channel of R Lee and extends from Blarney to Mayfield and to Kilully
Peter Matson again Idont think T12 goes to Iniscarra It may do. P 31 does Ovens is P 31 P12 joins T 23 to the west
Thanks Peter – only a matter of time before we have a full map of the boundaries
The “V94” Routing Key area is huge: It includes Abbeyfeale and then a swathe through West Limerick, the southern shore of the estuary, the city, North-East Limerick, North West Tipperary, the eastern third of Clare and a small bit of South-East Galway near the R352 regional road. It must be the most popukous and probably one of the largest by area.
However, Newcastle West, which lies between the “V94” towns of Abbeyfeale and Rathkeale has its own designation: “V42” as has Kilmallock and most of South-East Limerick: “V35”.
Searching for Routing Keys for the Irish Cities in ‘EBT’ I have collected a few Routing Keys. They are all in a spreadsheet.
I’m now filling the eircode.codes map, but this is going one by one.
Is there a faster way to enter the routing keys on the map?
You can see the spreadsheet here http://homepage.eircom.net/~burdie/Master.ods
Great work.
Add Dunleer to A92 plz.
Dunleer added!
Rathmolyon is also A83 – thanks
Thanks Rowan
What’s the drill for submitting additions? I see the edit option, but backed off lest I make a mess of it.
R35 for Walsh Island, Co. Offaly.
Thanks Paul, I’ve added it in now.
–Ossian
The is also a Crookstown in R14 near Athy, Co. Kildare as well as the one listed above in P14, Co Cork.
P14 & R14, P32 & R32, P51 & R51, P56 & R56 ??? Do you reckon this near duplication of easily mistaken letter/number combinations was down to some numpty not thinking?
E41 goes out to Mullinahone, too.
Hi, it looks like googlemaps have all the Eircodes loaded now.
Rgds Frank
Added Curraglass Castlecor to P51, Should be able to draw lines between points now 🙂 its likely will show areas that need refining because of overlap and area’s that are unknown and not mapped
Who deleted all the Eircodes on the map and can we get them back from somewhere?
https://www.google.com/maps/d/viewer?usp=sharing&mid=1q39q6rVMhYMBHenw2_4WKTLrhPs
🙁
I live near Listowe Co Kerry Code Area V31.
Kerry Co Co Water Division are looking for the Eircode for all households i our Water Group Scheme, but I can get only 15 a day from the autu Eircode finder. Is there any place that I cn get a listing, I need about 150.
If you search for them in your browser using ‘incognito mode’ you can restart your browser every 15 searches and you will get another 15.
Jerry Mason
You get another 15 when you use another browser (i.e. Internet Explorer, Mozilla, Chrome, etc.)