How to call the operator from a Greek payphone?

Question

What I need to do is find out the number for a specific payphone here in Thasos, Greece, while I'm on vacation, so I can receive some calls at it (if possible). There's no phone number displayed on it, and I can't figure out how to call the operator to ask what its number is (dialing 0 doesn't do anything).

Any help is much appreciated. Thanks! (Eucharisto!)

Answer 1

You can call from that payphone to a mobile phone or a phone that can recognize the number that you are calling from. I think that it works.

Answer 2

cal 139 to find that out