Your IP address:
Provider:
...

For example: 34.205.142.9

/
Input
Address: 99.77.168.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 01100011.01001101.10101000.00000000
Reserved: No
Result
Network: 99.77.168.0/21 (Class A)
First IP: 99.77.168.1
Last IP: 99.77.175.254
Broadcast: 99.77.175.255
Network range: 99.77.168.0 - 99.77.175.255
List of all IP addresses: 99_77_168_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048