Boeing has recently decided to do away with customer specific designations to all its types.
in other words, no more type designations such as B737-8AS,B747-830 or B777-31HER.
As from now and going back to roughly to production as of August 2016,these are simply 737-800 747-8s or 777-300ERs and are shown as such in official registers.
The change seems to be in effect as of line # 6076.
Source, Aviation Letter.