Your IP address:
Provider:
...

For example: 216.73.216.99

/
Input
Address: 23.228.208.0
Netmask: 255.255.240.0 = 20
Inversion mask: 0.0.15.255
Binary: 00010111.11100100.11010000.00000000
Reserved: No
Result
Network: 23.228.208.0/20 (Class A)
First IP: 23.228.208.1
Last IP: 23.228.223.254
Broadcast: 23.228.223.255
Network range: 23.228.208.0 - 23.228.223.255
List of all IP addresses: 23_228_208_0-20.txt
Number of hosts: 4094
Number of IP addresses: 4096