Your IP address:
Provider:
...

For example: 18.223.15.47

/
Input
Address: 72.40.0.0
Netmask: 255.255.0.0 = 16
Inversion mask: 0.0.255.255
Binary: 01001000.00101000.00000000.00000000
Reserved: No
Result
Network: 72.40.0.0/16 (Class A)
First IP: 72.40.0.1
Last IP: 72.40.255.254
Broadcast: 72.40.255.255
Network range: 72.40.0.0 - 72.40.255.255
List of all IP addresses: 72_40_0_0-16.txt
Number of hosts: 65534
Number of IP addresses: 65536