COA1612 may have been the last Continental departure. Continental and United started operating under a SOC (single operating Certificate) on November 30, 2011 at 1200Z. Since United and Continental are global operations, this time was decided upon because it was the same date and time world wide. All flights that departed prior to that time continued to use the Continental call sign until the flight terminated. Any flights departing at or after were issued the United Call sign. While COA1612 was the last departure, COA86 had already been in the air having departed out of Shanghai, China. Having a 13 hour flight, COA86 became the last Continental arrival.