Your IP address:
Provider:
...

For example: 18.119.213.235

/
Input
Address: 208.78.4.0
Netmask: 255.255.254.0 = 23
Inversion mask: 0.0.1.255
Binary: 11010000.01001110.00000100.00000000
Reserved: No
Result
Network: 208.78.4.0/23 (Class C)
First IP: 208.78.4.1
Last IP: 208.78.5.254
Broadcast: 208.78.5.255
Network range: 208.78.4.0 - 208.78.5.255
List of all IP addresses: 208_78_4_0-23.txt
Number of hosts: 510
Number of IP addresses: 512