Nothing wrong with asking someone where in the world they live, IMO, but they also have the right to divulge as much or as little as they'd like. You could always ask "are you able to get to an AA meeting?" and take it from there.
Sometimes I get curious as to where different members are from. In some of the classes I've been a part of, I feel like it helps me get to know and connect with people a bit better if not just a topic of conversation (i.e., "how's the weather there, heard you've had a bad storm, etc"...) so I can kind of relate to what you're saying. I just don't think it ultimately matters from the standpoint of being supportive and of service.