Your IP address:
Provider:
...

For example: 3.145.23.123

/
Input
Address: 128.212.0.0
Netmask: 255.255.0.0 = 16
Inversion mask: 0.0.255.255
Binary: 10000000.11010100.00000000.00000000
Reserved: No
Result
Network: 128.212.0.0/16 (Class B)
First IP: 128.212.0.1
Last IP: 128.212.255.254
Broadcast: 128.212.255.255
Network range: 128.212.0.0 - 128.212.255.255
List of all IP addresses: 128_212_0_0-16.txt
Number of hosts: 65534
Number of IP addresses: 65536