Spectrum Search Lite is a free program available from the New Zealand Ministry of Economic Developments Spectrum Management website. It details, on a "tuneable" graph, all of the frequency allocations including aeronautical for all of New Zealand. A map feature is also provided and provides a good overview of where aeronautical transmissions are made from including ACARS sites.
You will need to download the Spectrum Lite database and a there is also a corresponding search tool (Prism Lite) for text base recovery of frequency allocations.
