Calculate broadcast and network address
from IP address and netmask
Enter your IP address:  • • •
Enter your subnet mask:  • • •
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 second IP address:  • • •
The systems are: