Originally Posted by
PoorFlyer
About 20 different codes under availability in the Standard business class award.
Including C9 and NC0. What do the suffix numeral mean?
Thanks
Those are the two that matter. NC0 means that your upgrade will not confirm at this point. C9 means that there are at least nine C seats left for sale, so your chances are not terrible as of now.

D and Z availability will typically tell you the degree of seats left, since those are the lower C buckets.