Your IP address:
Provider:
...

For example: 18.222.155.58

/
Input
Address: 199.15.112.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 11000111.00001111.01110000.00000000
Reserved: No
Result
Network: 199.15.112.0/21 (Class C)
First IP: 199.15.112.1
Last IP: 199.15.119.254
Broadcast: 199.15.119.255
Network range: 199.15.112.0 - 199.15.119.255
List of all IP addresses: 199_15_112_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048