I understand the Deputy's question as referring to the use by out-of-hour GP co-operatives of local landline numbers rather than potentially more expensive to use Lo-Call numbers such as 1890 numbers.
Lo-Call numbers were introduced before there was major competition in the telephone market in Ireland. Initially a call to a 1890 number would have cost the same as calling a local landline number. Now calls to 1890 numbers can vary widely – from 4c per minute to 34c per minute on some mobiles.
Although part funded by the HSE, out-of-hours co-operatives are private entities, and as such it is a matter for each co-operative to determine whether to use a local landline number or a Lo-Call number. The majority of out-of-hours co-operatives use a Lo-Call number and an alternative local landline number.