CIDR calculator
Runs entirely in your browser. Useful for reading IP reports, ACLs, and route announcements.
Result
Canonical CIDR
205.233.91.0/24
Version
IPv4
Prefix
/24
Network
205.233.91.0
Broadcast
205.233.91.255
First address
205.233.91.1
Last address
205.233.91.254
Netmask
255.255.255.0
Wildcard
0.0.0.255
Total addresses
256
Usable hosts
254