Your IP address:
Provider:
...

For example: 18.119.213.235

/
Input
Address: 139.73.0.0
Netmask: 255.255.128.0 = 17
Inversion mask: 0.0.127.255
Binary: 10001011.01001001.00000000.00000000
Reserved: No
Result
Network: 139.73.0.0/17 (Class B)
First IP: 139.73.0.1
Last IP: 139.73.127.254
Broadcast: 139.73.127.255
Network range: 139.73.0.0 - 139.73.127.255
List of all IP addresses: 139_73_0_0-17.txt
Number of hosts: 32766
Number of IP addresses: 32768