Subnet Calculator

 
 

    • Dot-decimal notation
    • Unsigned 32-bit integer

    • CIDR notation
    • Network Range
    • = unique addresses
    • Usable Range

    • Used for Reverse DNS
    • Colon-hexadecimal notation
    • Colon-hexadecimal notation
    • Unsigned 128-bit integer

    • CIDR notation
    • Network Range

    • = x /64 subnets

    • Used for Reverse DNS