Your IP address:
Provider:
...

For example: 216.73.216.57

/
Input
Address: 129.77.0.0
Netmask: 255.255.252.0 = 22
Inversion mask: 0.0.3.255
Binary: 10000001.01001101.00000000.00000000
Reserved: No
Result
Network: 129.77.0.0/22 (Class B)
First IP: 129.77.0.1
Last IP: 129.77.3.254
Broadcast: 129.77.3.255
Network range: 129.77.0.0 - 129.77.3.255
List of all IP addresses: 129_77_0_0-22.txt
Number of hosts: 1022
Number of IP addresses: 1024