Your IP address:
Provider:
...

For example: 44.222.116.199

/
Input
Address: 54.242.0.0
Netmask: 255.254.0.0 = 15
Inversion mask: 0.1.255.255
Binary: 00110110.11110010.00000000.00000000
Reserved: No
Result
Network: 54.242.0.0/15 (Class A)
First IP: 54.242.0.1
Last IP: 54.243.255.254
Broadcast: 54.243.255.255
Network range: 54.242.0.0 - 54.243.255.255
Number of hosts: 131070
Number of IP addresses: 131072