Originally Posted by
edy4eva
Me and my wife, she was blue, I was gold. Both on the same ticket, back in 2009. Checked it online, I was something like 50, she was in mid 300's.
I thought it's to do with tier level. Anyhow. Now I think it's just a random number, they should replace SEQ with RAN

I am quite sure this is linked to tier level. The boarding pass stub doesn't carry any verbiage on status, yet I have experienced flight attendants recognizing I am Gold and welcoming me on board accordingly.