Your IP address:
Provider:
...

For example: 18.116.85.72

/
Input
Address: 77.123.128.0
Netmask: 255.255.252.0 = 22
Inversion mask: 0.0.3.255
Binary: 01001101.01111011.10000000.00000000
Reserved: No
Result
Network: 77.123.128.0/22 (Class A)
First IP: 77.123.128.1
Last IP: 77.123.131.254
Broadcast: 77.123.131.255
Network range: 77.123.128.0 - 77.123.131.255
List of all IP addresses: 77_123_128_0-22.txt
Number of hosts: 1022
Number of IP addresses: 1024