Your IP address:
Provider:
...

For example: 216.73.216.51

/
Input
Address: 208.89.40.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 11010000.01011001.00101000.00000000
Reserved: No
Result
Network: 208.89.40.0/21 (Class C)
First IP: 208.89.40.1
Last IP: 208.89.47.254
Broadcast: 208.89.47.255
Network range: 208.89.40.0 - 208.89.47.255
List of all IP addresses: 208_89_40_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048