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Eircode Routing Keys

  • 14-07-2015 8:30pm
    #1
    Closed Accounts Posts: 267 ✭✭ OssianSmyth


    I've compiled a list of Eircode routing keys along with corresponding towns.

    I have 131 so far. Eircode say that there are 139 in total - so it would be great if you could look at the list and see if your routing key is one of the missing 8.

    http://www.ossiansmyth.ie/eircode-routing-keys/

    Note that routing keys sometimes cross county boundaries.

    I notice that routing keys do not seem to be evenly spread based on population. Rush Lusk, Malahide, Balbriggan and Skerries each have their own routing key while Limerick city and county is mostly covered by one key with a population of about 80K.

    Is this a sign of projected future population growth?

    Also I notice that the random, 4-character element of the eircode is not that random. There are 390K possible combinations less 130K inappropriate words. So that's 260K choices. However the final four characters of my eircode "XN50" is also a valid eircode in the first 4 other routing keys that I tried. mmm...


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Comments

  • Closed Accounts Posts: 148 ✭✭ a65b2cd


    You seem to be missing: A42, A45, F56, P31, P32, T34, V31, AND X42


  • Registered Users Posts: 11,447 ✭✭✭✭ expectationlost


    heres a crowdsourced map of the routing keys https://www.google.com/maps/d/u/0/edit?mid=zrmXDfjvem7g.k2eSAnvagEdQ partly based on above


  • Registered Users Posts: 6,699 ✭✭✭ plodder


    I've compiled a list of Eircode routing keys along with corresponding towns.

    I have 131 so far. Eircode say that there are 139 in total - so it would be great if you could look at the list and see if your routing key is one of the missing 8.

    http://www.ossiansmyth.ie/eircode-routing-keys/

    Note that routing keys sometimes cross county boundaries.

    I notice that routing keys do not seem to be evenly spread based on population. Rush Lusk, Malahide, Balbriggan and Skerries each have their own routing key while Limerick city and county is mostly covered by one key with a population of about 80K.

    Is this a sign of projected future population growth?

    Also I notice that the random, 4-character element of the eircode is not that random. There are 390K possible combinations less 130K inappropriate words. So that's 260K choices. However the final four characters of my eircode "XN50" is also a valid eircode in the first 4 other routing keys that I tried. mmm...
    No, I don't think so :)


  • Registered Users Posts: 6,699 ✭✭✭ plodder


    Good first attempt at a mapping. Getting the actual boundaries will require a bit more work though. You are right there is a huge variation in area size. The areas reflect An Post's delivery structure. So, there isn't necessarily an obvious justification for all of them.


  • Registered Users Posts: 11,447 ✭✭✭✭ expectationlost


    plodder wrote: »
    Good first attempt at a mapping. Getting the actual boundaries will require a bit more work though. You are right there is a huge variation in area size. The areas reflect An Post's delivery structure. So, there isn't necessarily an obvious justification for all of them.

    so why isnt' there a map already of An Post postal towns (or presort codes and subareas) ?


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  • Registered Users Posts: 2,091 ✭✭✭ marmurr1916


    a65b2cd wrote: »
    You seem to be missing: A42, A45, F56, P31, P32, T34, V31, AND X42

    P31 is centered on Ballincollig in Co. Cork (just west of Cork city), P32 is part of north-west Co. Cork, between Cork city and Millstreet (Rylane is marked with P32 on the map above), T34 is rural areas and villages (including Whitechurch and Carrignavar) a few miles north of Cork city.

    Cork towns:

    Ballincollig - P31

    Bandon - P72

    Bantry - P75

    Blarney - see Cork City (northside)

    Carrigaline - P43

    Carrignavar - T34

    Charleville - P56

    Clonakilty - P85

    Cobh - P24

    Cork City (northside) - T23

    Cork City (southside) - T12

    Dunmanway - P47

    Fermoy - P61

    Glanmire - T45

    Kanturk - P51 (also Mallow, Millstreet)

    Kinsale - P17

    Macroom - P12

    Mallow - see Kanturk

    Midleton - P25

    Millstreet - see Kanturk

    Mitchelstown - P67

    Monkstown - see Cork City (southside)

    Passage West - see Cork City (southside)

    Rylane - P32

    Skibbereen - P81

    Watergrasshill - T56

    Youghal - P36


  • Registered Users Posts: 11,447 ✭✭✭✭ expectationlost


    P31 is centered on Ballincollig in Co. Cork (just west of Cork city).
    oh great think the map has atleast one of all of the keys


    15 large letter areas

    Monasterevin W32 is surrounder by R's


  • Registered Users Posts: 2,091 ✭✭✭ marmurr1916


    oh great think the map has atleast one of all of the keys


    15 large letter area

    Monasterevin W32 is surrounder by R's

    I still can't find P14 for Co. Cork - listed here:

    http://www.cso.ie/en/releasesandpublications/er/dber/domesticbuildingenergyratingsquarter22015/#.VaXCw_lVikr


  • Registered Users Posts: 1,235 ✭✭✭ D.L.R.


    These routing keys seem to have been pulled out of someone's arse.. no order, no sequence, no logic.

    The "A" zone is split in two ffs, from Wicklow to Monaghan. What the actual f**k?

    With only 130 routing codes, building in some intuitive regional logic should have been easy.

    For some inexplicable reason, they've chosen not to do that.

    So messy and illogical, very frustrating.


  • Registered Users Posts: 6,699 ✭✭✭ plodder


    so why isnt' there a map already of An Post postal towns (or presort codes and subareas) ?
    I'd say such a map exists, but they don't want to publish it, as it opens the whole can of worms about the structure of the code. They want people to treat eircodes as simple identifiers with no visible structure. To do anything useful with them, they want you to license their products.

    The backers of loc8 (the FTAI) have said they will produce a map in conjunction with someone who has access to the Eircode database.


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  • Registered Users Posts: 6,699 ✭✭✭ plodder


    D.L.R. wrote: »
    These routing keys seem to have been pulled out of someone's arse.. no order, no sequence, no logic.

    The "A" zone is split in two ffs, from Wicklow to Monaghan. What the actual f**k?

    With only 130 routing codes, building in some intuitive regional logic should have been easy.

    For some inexplicable reason, they've chosen not to do that.

    So messy and illogical, very frustrating.
    They explain their reasoning in a design document that was never officially published and therefore no chance for the public to have any input to it.

    Someone uploaded a copy of it here

    http://www.docdroid.net/soI9zRx/nps-design-report-v4-redacted.pdf.html


  • Registered Users Posts: 1,661 fxotoole


    I think the Naas sorting centre is W23, since W23 seems to be the first three digits of the eircode for most of North Kildare


  • Registered Users Posts: 1,661 fxotoole


    D.L.R. wrote: »
    These routing keys seem to have been pulled out of someone's arse.. no order, no sequence, no logic.

    The "A" zone is split in two ffs, from Wicklow to Monaghan. What the actual f**k?

    With only 130 routing codes, building in some intuitive regional logic should have been easy.

    For some inexplicable reason, they've chosen not to do that.

    So messy and illogical, very frustrating.

    The keys are probably based on the existing infrastructure of sorting offices that are already in place.


  • Closed Accounts Posts: 267 ✭✭ OssianSmyth


    Thanks to everyone who helped - I now have all 139 routing keys with at least one town in each. I am not going to map them manually - I'll wait until I can get a file to do the job with a script.

    http://www.ossiansmyth.ie/eircode-routing-keys/
    Crookstown


  • Registered Users Posts: 315 ✭✭ moyners


    An Post have a map of their delivery zones for people wanting to deliver promotional mail. There's more of these than eircode routing codes so I'm guessing some of them are amalgamated but it gives you an idea of how crazy some of the areas are:
    https://www.anpost.ie/AnPost/AnPostDM/ProductsAndServices/Publicity+Post/Instant+Quote/Publicity+Post+Map.htm


  • Closed Accounts Posts: 267 ✭✭ OssianSmyth


    moyners wrote: »
    An Post have a map of their delivery zones for people wanting to deliver promotional mail. There's more of these than eircode routing codes so I'm guessing some of them are amalgamated but it gives you an idea of how crazy some of the areas are:
    https://www.anpost.ie/AnPost/AnPostDM/ProductsAndServices/Publicity+Post/Instant+Quote/Publicity+Post+Map.htm
    I think you're right. Some of the routing key borders certainly match parts of these an post division maps.


  • Registered Users Posts: 315 ✭✭ moyners


    I think you're right. Some of the routing key borders certainly match parts of these an post division maps.

    T12, Cork south city also includes all the areas down the N71 as far as Innashannon so Waterfall, Halfway, Ballinhassig, the Airport (and Business Park) and those areas.


  • Closed Accounts Posts: 267 ✭✭ OssianSmyth


    The three-character routing key allowed for 25^3 combinations or 15,625 areas. But eircode chose just 139.

    Smaller areas would have been more useful. We now have H91 - an area with 70K people stretching from Ballyvaughan in Clare around to Spiddal in West Galway. These towns are 65km apart and located in separate provinces.


  • Registered Users Posts: 6,699 ✭✭✭ plodder


    The three-character routing key allowed for 25^3 combinations or 15,625 areas. But eircode chose just 139.

    Smaller areas would have been more useful. We now have H91 - an area with 70K people stretching from Ballyvaughan in Clare around to Spiddal in West Galway. These towns are 65km apart and located in separate provinces.
    and the areas in rural North Dublin are small, population no more than couple of thousand if even that.


  • Closed Accounts Posts: 267 ✭✭ OssianSmyth


    plodder wrote: »
    and the areas in rural North Dublin are small, population no more than couple of thousand if even that.

    it's less than that.

    areas with number of dwellings in each:
    A41 394
    A42 857
    A45 496


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  • Registered Users Posts: 13,372 ✭✭✭✭ loyatemu


    Why did they follow the An Post routing scheme when An Post already have their own scheme and have said they will continue using it regardless of Eircode?


  • Registered Users Posts: 6,699 ✭✭✭ plodder


    loyatemu wrote: »
    Why did they follow the An Post routing scheme when An Post already have their own scheme and have said they will continue using it regardless of Eircode?
    Because if the whole thing didn't have the "moral support" of An Post, it was thought people wouldn't use it given that it's supposed to be a postcode. But, in reality what was needed was, a location code, and a unique identifier, not particularly a postcode. Crazy situation.


  • Closed Accounts Posts: 267 ✭✭ OssianSmyth


    "There are approx 2,000 An Post post towns. An Post identified a subset of 139 to be used by Eircode that are future proofed...
    It's a hierarchy. 4 main centres at the top, then 139 principle post towns, then 2,000 post towns. An Post would be best to explain"


    https://twitter.com/autoaddress/status/607158063313895424


  • Closed Accounts Posts: 9,769 ✭✭✭ my3cents


    If anyone is still looking for them X42 Goes with the Kilmacthomas Co. Waterford delivery addresses.


  • Registered Users Posts: 78,233 ✭✭✭✭ Victor


    moyners wrote: »
    An Post have a map of their delivery zones for people wanting to deliver promotional mail. There's more of these than eircode routing codes so I'm guessing some of them are amalgamated but it gives you an idea of how crazy some of the areas are:
    https://www.anpost.ie/AnPost/AnPostDM/ProductsAndServices/Publicity+Post/Instant+Quote/Publicity+Post+Map.htm
    Some of that is, er, novel. :)

    355312.PNG

    355311.PNG

    355313.PNG


  • Registered Users Posts: 7,092 ✭✭✭ GerardKeating


    The three-character routing key allowed for 25^3 combinations or 15,625 areas. But eircode chose just 139.

    Smaller areas would have been more useful. We now have H91 - an area with 70K people stretching from Ballyvaughan in Clare around to Spiddal in West Galway. These towns are 65km apart and located in separate provinces.

    H91 goes further than An Spidéal, out to at least Ros A Mhi, or further


  • Registered Users Posts: 18,889 ✭✭✭✭ murphaph


    moyners wrote: »
    An Post have a map of their delivery zones for people wanting to deliver promotional mail. There's more of these than eircode routing codes so I'm guessing some of them are amalgamated but it gives you an idea of how crazy some of the areas are:
    https://www.anpost.ie/AnPost/AnPostDM/ProductsAndServices/Publicity+Post/Instant+Quote/Publicity+Post+Map.htm
    That's a real eye opener, thanks, and explains why places like Newcastle, Co. Dublin now have a D22 XXXX Eircode (and thereby will invariably be seen as less desirable). Same goes for Rathcoole (now apparently part of D24 and Portmarnock and Howth, now apparently part of D13. I expect there to be some backlash, especially from Howth/Portmarnock property owners.

    It's so crazy there is an ENCLAVE in the An Post delivery areas!! If you look at Lucan (around Fonthill) you'll see that there's an enclave of LN1 totally surrounded by LN2. I strongly suspect this is a result of the time Liam Lawlor meddled with the system to remove lands he had an interest in from D22 an transfer them to Lucan, County Dublin. It seems terribly unfair that property owners in places like Portmarnock, Howth, Newcastle and Rathcoole/Saggart now have to suffer these transfers to what are obviously less desirable Dublin postal districts, while properties that should have been in D22 all along get neutral Eircodes.


  • Closed Accounts Posts: 68 ✭✭✭ threeiron


    murphaph wrote: »
    I expect there to be some backlash, especially from Howth/Portmarnock property owners.
    I think the Eircode will actually enable households to write their actual geographical address without any penalty of the post arriving a day late - because An Post will use the Eircode to route it correctly. This is one of the unforeseen benefits of Eircodes.


  • Registered Users Posts: 5,998 ✭✭✭ alias no.9


    P51 seems to stretch from Kerry (Rathmore) through north Cork to Waterford (Cappoquin) along the Blackwater but is bisected by the M8 corridor at Fermoy which is P61


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  • Registered Users Posts: 78,233 ✭✭✭✭ Victor


    During the week, I had a niggling feeling that a lot of the routings were down to how mail trains (the last such trains were withdrawn about 15 years ago) operated - each train station in North County Dublin has it's own code, etc. Not only were routings important, but with post and trains, time of day is also important - certain parts of the network would have more than one mail train per day, therefore, certain post would be prioritised.

    I've just twigged why parts of Wicklow are associated with the North East - telephone codes, which were in turn somewhat based on telephone exchange routings, which were originally based on telegraph routings, which were based on railway lines (slightly different from train routes).

    In recent years, there has been some amalgamation of telephone area codes. Note that the telephone code boundaries aren't precise.

    355736.PNG

    355741.PNG


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