What is the story with an escort (penelope in galway) advertising with a landline number? Is it wise? Can't it easily be traced back to a location by police or others?

I don't think I can recall a landline number ever being used by an escort before. Should this one be avoided by punters or am I being needlessly paranoid? I'm not thinking of visiting or anything, or trying to put a spanner in the woman's operation, just curious about possible implications of this unusual situation.