CIDR calculator
Runs entirely in your browser. Useful for reading IP reports, ACLs, and route announcements.
Result
Canonical CIDR
34.4.128.0/18
Version
IPv4
Prefix
/18
Network
34.4.128.0
Broadcast
34.4.191.255
First address
34.4.128.1
Last address
34.4.191.254
Netmask
255.255.192.0
Wildcard
0.0.63.255
Total addresses
16384
Usable hosts
16382