Your IP address:
Provider:
...

For example: 18.189.170.17

/
Input
Address: 129.17.0.0
Netmask: 255.255.0.0 = 16
Inversion mask: 0.0.255.255
Binary: 10000001.00010001.00000000.00000000
Reserved: No
Result
Network: 129.17.0.0/16 (Class B)
First IP: 129.17.0.1
Last IP: 129.17.255.254
Broadcast: 129.17.255.255
Network range: 129.17.0.0 - 129.17.255.255
List of all IP addresses: 129_17_0_0-16.txt
Number of hosts: 65534
Number of IP addresses: 65536