<P> Numbers on the Irish Telephone Numbering Plan are regulated and assigned to operators by ComReg . </P> <P> Telephone numbers in Ireland are similar in format to those in many European open numbering plans, for example the UK or Germany, with only the subscriber's number being required for local dialling . However, one can also dial local calls with the full area code without any difference in charge . The trunk prefix is' 0' and is followed by an area code, the first digit of which indicates the geographical area . Calls made from mobile phones, however, always require the full area code and phone number . </P> <P> Irish area codes vary in length, between one and three digits (excluding the leading 0), and subscribers' numbers are between five and seven digits . A migration to a standard format, (0xx) xxx xxxx, is in progress; however, to avoid disruption, this process is only being carried out as needed where existing area codes and local numbering systems have reached full capacity . </P> <P> Irish geographical area structured on a regional basis and follow a logical hierarchy of regions and sub-regions . These area codes approximately correspond to the following geographical regions: 01 - Greater Dublin, 02 - South (Cork), 04 (North East), 05 (South East) 06 (Midwest / Southwest), 07 (Northwest), 09 (West). The midlands area is covered by several regional codes . </P>

How many digits in an irish landline number
find me the text answering this question