It likely varies depending upon the fleet at your local airport, but ADS-B implementation in the US has a long way to go before the 2020 deadline. Last time I checked (early 2015) only about 30% of carrier jets near MSP (a major Delta hub) had ADS-B installed/turned on. My understanding is that the cost is under $5,000 per aircraft - it astounds me that for all the money wasted on security theatre the aviation industry has dragged it's feet on ADS-B implementation.