CIDR Calculator

Calculate every fact about a CIDR block — network, broadcast, host range, mask, wildcard, classful info.

All local

examples·

cidr block

addressing

network192.168.1.0

netmask255.255.255.0

wildcard0.0.0.255

broadcast192.168.1.255

prefix/24

hosts

first host192.168.1.1

last host192.168.1.254

usable hosts254

total addresses256

classC

private (RFC 1918)yes

binary

11000000.10101000.00000001.00000000