Formula One CEO Chase Carey is still committed to a 25-race calendar in future and has warned events with "unattractive" deals signed under the previous regime that their places on it are at risk.
Liberty took control of F1 at the beginning of 2017 and has sought out new venues to host races in the future.
The idea of 25 races in a season is unpopular with drivers and teams and it would likely be introduced with a significant tweak to the existing weekend format.
So far the only new race added is the 2020 Vietnam Grand Prix, which will take place in the city of Hanoi.