Your IP address:
Provider:
...

For example: 3.145.111.183

/
Input
Address: 16.12.16.0
Netmask: 255.255.240.0 = 20
Inversion mask: 0.0.15.255
Binary: 00010000.00001100.00010000.00000000
Reserved: No
Result
Network: 16.12.16.0/20 (Class A)
First IP: 16.12.16.1
Last IP: 16.12.31.254
Broadcast: 16.12.31.255
Network range: 16.12.16.0 - 16.12.31.255
List of all IP addresses: 16_12_16_0-20.txt
Number of hosts: 4094
Number of IP addresses: 4096