CIDR calculator
Runs entirely in your browser. Useful for reading IP reports, ACLs, and route announcements.
Result
Canonical CIDR
34.2.0.0/20
Version
IPv4
Prefix
/20
Network
34.2.0.0
Broadcast
34.2.15.255
First address
34.2.0.1
Last address
34.2.15.254
Netmask
255.255.240.0
Wildcard
0.0.15.255
Total addresses
4096
Usable hosts
4094