CIDR calculator
Runs entirely in your browser. Useful for reading IP reports, ACLs, and route announcements.
Result
Canonical CIDR
66.249.84.0/23
Version
IPv4
Prefix
/23
Network
66.249.84.0
Broadcast
66.249.85.255
First address
66.249.84.1
Last address
66.249.85.254
Netmask
255.255.254.0
Wildcard
0.0.1.255
Total addresses
512
Usable hosts
510