Your IP address:
Provider:
...

For example: 54.175.5.131

/
Input
Address: 65.8.248.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 01000001.00001000.11111000.00000000
Reserved: No
Result
Network: 65.8.248.0/21 (Class A)
First IP: 65.8.248.1
Last IP: 65.8.255.254
Broadcast: 65.8.255.255
Network range: 65.8.248.0 - 65.8.255.255
List of all IP addresses: 65_8_248_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048