Are 32 caliber bullets centerfire or rimfire?

Let's use the correct terms- BULLETS are the part of a CARTRIDGE that come out of the barrel. .32 Cartridges are now centerfire, but many years ago were rimfire. .32 rimfire guns have not been made in about the past 100 years, and are considered obsolete. There are also several DIFFERENT .32 centerfire cartridges- .32 Auto, .32 S&W revolver, .32 Long, .32-20 revolver, etc.