Your IP address:
Provider:
...

For example: 216.73.216.57

/
Input
Address: 72.44.40.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 01001000.00101100.00101000.00000000
Reserved: No
Result
Network: 72.44.40.0/21 (Class A)
First IP: 72.44.40.1
Last IP: 72.44.47.254
Broadcast: 72.44.47.255
Network range: 72.44.40.0 - 72.44.47.255
List of all IP addresses: 72_44_40_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048