cidr calculator

CIDR subnet calculator.

Enter any IPv4 CIDR block. Get the network address, broadcast, netmask, and usable host range.

canonical
192.168.1.0/24
network
192.168.1.0
broadcast
192.168.1.255
netmask
255.255.255.0
wildcard
0.0.0.255
first host
192.168.1.1
last host
192.168.1.254
total addresses
256
usable hosts
254
AIExplain this subnet

Frequently asked

Is this tool free?
Yes. The CIDR subnet calculator is free with no limits. Calculate as many subnets as you need.
Do I need to sign up?
No. Enter a CIDR block and see the results. No account required.
Is my data private?
All calculations run entirely in your browser using JavaScript. No data is sent to any server. The tool is pure math with no network requests.