Your IP address:
Provider:
...

For example: 52.15.112.69

/
Input
Address: 139.73.240.0
Netmask: 255.255.240.0 = 20
Inversion mask: 0.0.15.255
Binary: 10001011.01001001.11110000.00000000
Reserved: No
Result
Network: 139.73.240.0/20 (Class B)
First IP: 139.73.240.1
Last IP: 139.73.255.254
Broadcast: 139.73.255.255
Network range: 139.73.240.0 - 139.73.255.255
List of all IP addresses: 139_73_240_0-20.txt
Number of hosts: 4094
Number of IP addresses: 4096