In Ireland, we use Eircode with one house per postcode. This is very handy because you don't need to type in your full address on a lot of websites, just the Ei

In Ireland, we use Eircode with one house per postcode. This is very handy because you don't need to type in your full address on a lot of websites, just the Eircode. The first three digits of an Eircode are more like a traditional postcode in that they indicate your area/town but the next four are randomised for each address.