I've booked tickets on Arkia through cheapoair (I don't usually use travel agents, but their own site didn't seem to have availability for the flight I wanted). Cheapoair have sent me a six letter reservation code which looks like a Sabre code, but I can't find the place on the Arkia website to log in to the booking.

I don't have ticket numbers from cheapoair but I suspect if I were able to access the booking directly, I could see them online.

I can't use Arkia's checkin function because it's more than three days before the flight.

Which GDS do Arkia use? Can you access their reservations through another airline or other website? I just want to get the ticket numbers and make sure the booking is confirmed.