Den kserw an tha voithisei se tpt afto pou tha kanw post ala einai ena xrisimo web tool gia teties periptoseis to opoio iparxei kai gia download kai sou linei ta xeria oson afora adistrofes diadikasies, edopismo ip se subnet diladi ktl.

To url einai to

http://www.subnet-calculator.com/