IP Subnet Calculator
Calculate network address, broadcast, usable hosts, netmask, and wildcard for IPv4 networks (CIDR).
About CIDR Notation
CIDR (Classless Inter-Domain Routing) notation specifies a network as IP/prefix, e.g., 192.168.1.0/24. The prefix (0-32) indicates how many bits are network bits. /24 = 256 addresses (254 usable), /16 = 65,536, /8 = ~16.7 million.
Network Input
IP Address
CIDR Prefix (/0 - /32)
Network Details
Network Address
192.168.1.0
Broadcast
192.168.1.255
First Usable
192.168.1.1
Last Usable
192.168.1.254
Subnet Mask
255.255.255.0
Wildcard Mask
0.0.0.255
Total Addresses
256
Usable Hosts
254
CIDR: 192.168.1.0/24