List of Falcon 9 first-stage boosters

A Falcon 9 first-stage booster is a reusable rocket booster used on the Falcon 9 and Falcon Heavy orbital launch vehicles manufactured by SpaceX. The manufacture of first-stage booster constitutes about 60% of the launch price of a single expended Falcon 9 (and three of them over 80% of the launch price of an expended Falcon Heavy), which led SpaceX to develop a program dedicated to recovery and reuse of these boosters for a significant decrease in launch costs. After multiple attempts, some as early as 2010, at controlling the reentry of the first stage after its separation from the second stage, the first successful controlled landing of a first stage occurred on 22 December 2015, on the first flight of the Full Thrust version. Since then, Falcon 9 first-stage boosters have been landed and recovered 273 times out of 284 attempts, including synchronized recoveries of the side-boosters of most Falcon Heavy flights. One of the Falcon Heavy center boosters landed softly but it was severely damaged during transport, and one mission, ViaSat-3, had the rocket’s side and center boosters fully expended, which makes it the first time that all of the boosters were expended.

In total 41 recovered boosters have been refurbished and subsequently flown at least a second time, with a record of 19 missions. SpaceX intentionally limited Block 3 and Block 4 boosters to flying only two missions each, but the company indicated in 2018 that they expected the Block 5 versions to achieve ten flights, each with only minor refurbishment. This milestone was first achieved by Booster B1051 on the Starlink-27 mission in 2021.

All boosters in Block 4 and earlier have been retired, expended, or lost. The last flight of a Block 4 booster was in June 2018. Since then all boosters in the active fleet are Block 5.

Booster names are a B followed by a four-digit number. The first Falcon 9 version, v1.0, had boosters B0001 to B0007. All following boosters were numbered sequentially starting at B1001, the number 1 standing for first-stage booster.