Your IP address:
Provider:
...

For example: 18.118.120.204

/
Input
Address: 156.4.0.0
Netmask: 255.254.0.0 = 15
Inversion mask: 0.1.255.255
Binary: 10011100.00000100.00000000.00000000
Reserved: No
Result
Network: 156.4.0.0/15 (Class B)
First IP: 156.4.0.1
Last IP: 156.5.255.254
Broadcast: 156.5.255.255
Network range: 156.4.0.0 - 156.5.255.255
Number of hosts: 131070
Number of IP addresses: 131072