Is there a hack to break subnets into smaller masks?

Question

Computer networks

Good afternoon, tell me please, is there such a tool that would automatically split subnets with large masks into smaller ones? For example, I have a bunch of subnets with a 16 mask, I would like to find a convector that would break them up, let's say, into a 24 mask and display a list of subnets already with a 24 mask. Like "summing up the other way around" mb someone solved it with a formula in exel, if it's not difficult to tell then the formula.

Answer 1

There is a good program called ipcalc (in any Linux from standard packages). There are also simple subnet calculators on the Internet. Here for example - jodies.de/ipcalc