Tools
CIDR Calculator
Subnet math: network, mask, host range and counts.
CIDR Calculator
Network
192.168.1.0
Mask
255.255.255.0
Broadcast
192.168.1.255
Host range
192.168.1.1 – 192.168.1.254
Total
256
Usable
254
About this tool
Work out the network address, netmask, broadcast address, usable host range and host count for any CIDR block such as 192.168.1.0/24.
Queries go straight from your browser to a public resolver over HTTPS. We do not proxy them, cache them or keep a log of what you looked up.