CIDR calculator
Runs entirely in your browser. Useful for reading IP reports, ACLs, and route announcements.
Result
Canonical CIDR
3.171.156.0/23
Version
IPv4
Prefix
/23
Network
3.171.156.0
Broadcast
3.171.157.255
First address
3.171.156.1
Last address
3.171.157.254
Netmask
255.255.254.0
Wildcard
0.0.1.255
Total addresses
512
Usable hosts
510