https://calculadoraip.org has all available calculators of subnetting:IP calculator (include subnets): https://calculadoraip.org/ipcalc/Supernetting: https://calculadoraip.org/supercalc/FLSM: https://calculadoraip.org/flsmcalc/VLSM: https://calculado...

Changed domain to this I think: https://calculadoraip.org/supercalc/

Hello,Im using this one:https://calculadoraip.org/supercalc/And it goes very well

Im using this free online tool to solve supernetting problems:https://calculadoraip.org/supercalc/