Your IP address:
Provider:
...

For example: 216.73.216.57

/
Input
Address: 31.56.142.0
Netmask: 255.255.254.0 = 23
Inversion mask: 0.0.1.255
Binary: 00011111.00111000.10001110.00000000
Reserved: No
Result
Network: 31.56.142.0/23 (Class A)
First IP: 31.56.142.1
Last IP: 31.56.143.254
Broadcast: 31.56.143.255
Network range: 31.56.142.0 - 31.56.143.255
List of all IP addresses: 31_56_142_0-23.txt
Number of hosts: 510
Number of IP addresses: 512