If there is a phone number for concierge, I've never been given it in 6 cruises...all concierge.
Concierge has a meeting for you when you first get on the ship....snacks provided....and that's when they take care of all your excursions and Palo, registering the kids in the clubs...all of that.... and they have always been able to get us whatever we needed at that time. Usually we've already pre-booked everything online, though, and only go to meet them or set up something special like a birthday celebration or the like.