Originally Posted by
mra123
Interesting! Both parents are ex-NW and have numbers starting with 6 (although dad is 61x and mom is 60x). They must've signed me up on NW when I was kid as I've had a delta account for as long as I can remember and my skymiles number is also a 60x. No association with our area codes though.
I don't think the NW numbers were in a sequential order, mine was 5xxxxxxxx and my wife's was 2xxxxxxxx and I signed up at least a decade before she did.