Calculate broadcast and network address from

IP address and netmask
Enter your IP address:
Enter your subnet mask:

Results:
Broadcast Address:
Network Address:
 

Calculate a netmask from the mask length
Enter your netmask length:
Results:
 

Calculate the mask length from the netmask
Enter your netmask:
Results:
 

Determine if a host is on the same network with a second host
Enter your IP address:
Enter your subnet mask:
Enter the second host's IP address:
The systems are: