For the type of aircraft that were used on flights from Daporijo airport to Guwahati and Dibrugarh, how many were in service in July 2017?
Daporijo Airport: Daporijo Airport (IATA: DEP, ICAO: VEDZ) is located at Daporijo in the state of Arunachal Pradesh, India. Daporijo Airport:  The airport had flights to Guwahati and Dibrugarh on Dornier Do 228 aircraft. Dornier Do 228:  In July 2017, 63 aircraft were in airline service.
63