SES-10 was the first SpaceX mission to launch using a previously flown orbital-class booster.
On 30 March 2017, Falcon 9 flight 32 carried the SES-10 communications satellite into geostationary transfer orbit. Its first stage, designated B1021, had previously flown the CRS-8 mission in April 2016 and had landed successfully on the drone ship Of Course I Still Love You.
This flight demonstrated that a recovered booster could be inspected, refurbished, and flown again rather than discarded after one mission. Reuse became a central feature of SpaceX’s launch strategy and helped reduce the cost and turnaround time of orbital launches.
The mission is sometimes described as the first “reflight” of a used orbital rocket. That distinction matters: earlier SpaceX missions had landed boosters, but SES-10 was the first to send one of those recovered stages back into space. The payload was operated by the satellite company SES.