Your IP address:
Provider:
...

For example: 18.216.94.152

/
Input
Address: 16.12.8.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 00010000.00001100.00001000.00000000
Reserved: No
Result
Network: 16.12.8.0/21 (Class A)
First IP: 16.12.8.1
Last IP: 16.12.15.254
Broadcast: 16.12.15.255
Network range: 16.12.8.0 - 16.12.15.255
List of all IP addresses: 16_12_8_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048