Subnet Calculator
Calculate network address, broadcast, host range, and subnet masks.
Network Address192.168.1.0
Broadcast Address192.168.1.255
Subnet Mask255.255.255.0
Wildcard Mask0.0.0.255
First Host192.168.1.1
Last Host192.168.1.254
Total Hosts254
CIDR Notation/24
CIDR Support
Enter any IP address with CIDR notation (/0 to /32) for instant subnet calculation.
Host Range
Shows first and last usable host addresses and total number of hosts.
Subnet Details
Network address, broadcast, subnet mask, and wildcard mask at a glance.
FAQ
What is CIDR notation?
CIDR notation (e.g., /24) indicates how many bits are used for the network portion of the address. /24 means 256 addresses (254 usable hosts).
What is a subnet mask?
A subnet mask separates the network and host portions of an IP address. /24 corresponds to 255.255.255.0.