Your IP address:
Provider:
...

For example: 3.237.31.131

/
Input
Address: 54.240.8.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 00110110.11110000.00001000.00000000
Reserved: No
Result
Network: 54.240.8.0/21 (Class A)
First IP: 54.240.8.1
Last IP: 54.240.15.254
Broadcast: 54.240.15.255
Network range: 54.240.8.0 - 54.240.15.255
List of all IP addresses: 54_240_8_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048