Will I get a new landline number when I switch to Vodafone?
If you are switching from another service provider (e.g Eir) and staying in the same property then you can keep your existing telephone number.
If you are switching to Vodafone as part of a house/property relocation then you may get a new phone number if you move into a different phone code area. Your telephone number is allocated to a defined geographic area called a Minimum Numbering Area (MNA). Your MNA is part of a wider STD (Subscriber Trunk Dialling) area which has a defined dialling code.