Three charities have been chosen by communications regulator Ofcom to be given the UK's first pan-European 116 helpline numbers.
The six-figure numbers, which will run alongside the charities' existing numbers, allow anyone in Europe to access providers of similar services.
Calls to 116 numbers are free in the UK from fixed lines, mobiles and public phone boxes.
The European Commission has introduced 116 numbers as part of its aim for what it terms ‘social value services' to be contactable by the same memorable number in all member states.
Christine Renouf, director of helplines at the NSPCC, said its new number was "a positive step towards making sure children are aware there are helplines across Europe which they can access through a single number".