Your IP address:
Provider:
...

For example: 54.82.44.149

/
Input
Address: 99.77.248.0
Netmask: 255.255.254.0 = 23
Inversion mask: 0.0.1.255
Binary: 01100011.01001101.11111000.00000000
Reserved: No
Result
Network: 99.77.248.0/23 (Class A)
First IP: 99.77.248.1
Last IP: 99.77.249.254
Broadcast: 99.77.249.255
Network range: 99.77.248.0 - 99.77.249.255
List of all IP addresses: 99_77_248_0-23.txt
Number of hosts: 510
Number of IP addresses: 512