Classless interdomain routing (CIDR) notation is a compact representation of an IP address and its associated routing prefix.
It's expressed as a / followed by a number (e.g. /0 or /10).
Input
Subnet Mask
Subnet Mask (Binary)
Network Address
Network Address (Binary)
Broadcast Address
First Host
Last Host
Total Addresses
Usable Hosts
Range (all addresses)
Previous Block
Next Block
Notes: /31 uses both addresses (RFC 3021). /32 is a single address.
