Your IP address:
Provider:
...

For example: 18.222.125.171

/
Input
Address: 77.123.96.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 01001101.01111011.01100000.00000000
Reserved: No
Result
Network: 77.123.96.0/21 (Class A)
First IP: 77.123.96.1
Last IP: 77.123.103.254
Broadcast: 77.123.103.255
Network range: 77.123.96.0 - 77.123.103.255
List of all IP addresses: 77_123_96_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048