Your IP address:
Provider:
...

For example: 216.73.217.125

/
Input
Address: 199.47.72.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 11000111.00101111.01001000.00000000
Reserved: No
Result
Network: 199.47.72.0/21 (Class C)
First IP: 199.47.72.1
Last IP: 199.47.79.254
Broadcast: 199.47.79.255
Network range: 199.47.72.0 - 199.47.79.255
List of all IP addresses: 199_47_72_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048