I have a friend on DL169 from NRT - SIN today (
flightaware) and I was looking at the flight history of that plane. It looks like before arriving in Tokyo, it flew as:
DL 8824 from IWK - NRT
DL 8958 from CRK - IWK
and flew on that route a number of other times operating as various flight numbers.
Does anybody know what's up with that? Is it a contracted service for the government (I'm guessing so), and if so, is there a list of all such routes?