Can someone give me a list of different airlines frequent flyer accounts sequence? What I mean is that, I need to know how to distinguish if a certain frequent flyer number belongs to delta or aadvantge etc? Does it start with a certain number? And how long or how many digits they are supposed to be? If someone could give me a list please, it would be GREATLY appreciated.

Thank you so much for your time. I am just a newbie and still checking out some posts.

HAve a great day everyone!