Your IP address:
Provider:
...

For example: 13.59.195.118

/
Input
Address: 77.123.0.0
Netmask: 255.255.128.0 = 17
Inversion mask: 0.0.127.255
Binary: 01001101.01111011.00000000.00000000
Reserved: No
Result
Network: 77.123.0.0/17 (Class A)
First IP: 77.123.0.1
Last IP: 77.123.127.254
Broadcast: 77.123.127.255
Network range: 77.123.0.0 - 77.123.127.255
List of all IP addresses: 77_123_0_0-17.txt
Number of hosts: 32766
Number of IP addresses: 32768