CIDR calculator
Runs entirely in your browser. Useful for reading IP reports, ACLs, and route announcements.
Result
Canonical CIDR
192.178.217.0/24
Version
IPv4
Prefix
/24
Network
192.178.217.0
Broadcast
192.178.217.255
First address
192.178.217.1
Last address
192.178.217.254
Netmask
255.255.255.0
Wildcard
0.0.0.255
Total addresses
256
Usable hosts
254