Your IP address:
Provider:
...

For example: 54.174.225.82

/
Input
Address: 3.144.0.0
Netmask: 255.248.0.0 = 13
Inversion mask: 0.7.255.255
Binary: 00000011.10010000.00000000.00000000
Reserved: No
Result
Network: 3.144.0.0/13 (Class A)
First IP: 3.144.0.1
Last IP: 3.151.255.254
Broadcast: 3.151.255.255
Network range: 3.144.0.0 - 3.151.255.255
Number of hosts: 524286
Number of IP addresses: 524288