The numbering system in FIA Formula 2 Championship is currently based on the previous season's team standings (similar to Formula One 1996–2013 numbering system) that was used since the formation of GP2 Series in 2005 until present. Additionally, since the 2020 season the number #19 has been retired along with #18 to honor Anthoine Hubert who sustained fatal injuries during one of the 2019 Belgian Grand Prix's support races.