In the Space Show radio program broadcast on 7/22/2017 at http://www.thespaceshow.com/file/7663/download?token=0hnS0L2y Gwynne Shotwell said that SpaceX is currently flying Falcon 9 Block 3, Block 4 coming soon, then 5 which will be the final iteration of the F9.
SpaceX is currently building F9s at a rate of 20/year. And it takes a little over a year to build a Falcon 9 from start to finish.
SpaceX is currently building F9s at a rate of 20/year. And it takes a little over a year to build a Falcon 9 from start to finish.