With a little help from some good ducting conditions out to the northeast today, my AirNav Systems RadarBox ADS-B receiver picked up Jet Connect's B738 ZK-ZQA operating NZAA to YBBN, at a range of 560.6nm or 1038.2km (highlighted red circle in top right of the map). This is my first verified reception over the 1000Km mark. There was also a good pickup to the south yesterday at around 340nm (red circle at the bottom of the map and not yet verified)
The outer circle is 500nm at 25nm increments.