Your IP address:
Provider:
...

For example: 216.73.216.57

/
Input
Address: 192.28.20.0
Netmask: 255.255.254.0 = 23
Inversion mask: 0.0.1.255
Binary: 11000000.00011100.00010100.00000000
Reserved: No
Result
Network: 192.28.20.0/23 (Class C)
First IP: 192.28.20.1
Last IP: 192.28.21.254
Broadcast: 192.28.21.255
Network range: 192.28.20.0 - 192.28.21.255
List of all IP addresses: 192_28_20_0-23.txt
Number of hosts: 510
Number of IP addresses: 512