Your IP address:
Provider:
...

For example: 3.22.75.92

/
Input
Address: 3.128.0.0
Netmask: 255.192.0.0 = 10
Inversion mask: 0.63.255.255
Binary: 00000011.10000000.00000000.00000000
Reserved: No
Result
Network: 3.128.0.0/10 (Class A)
First IP: 3.128.0.1
Last IP: 3.191.255.254
Broadcast: 3.191.255.255
Network range: 3.128.0.0 - 3.191.255.255
Number of hosts: 4194302
Number of IP addresses: 4194304