I have friends in NZ
, one of whom is a pilot for Mount Cook on ATR's. A quick mail to him revealed that the aforementioned flight was B744 ZK
-NBV performing a 'local' AKL
-AKL then went on its way to SFO
as ANZ8 shortly after.
Hope that helps you!
Reporting live from downtown Dewsbury, West Yorks, UK.