Your IP address:
Provider:
...

For example: 3.16.29.209

/
Input
Address: 209.191.144.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 11010001.10111111.10010000.00000000
Reserved: No
Result
Network: 209.191.144.0/21 (Class C)
First IP: 209.191.144.1
Last IP: 209.191.151.254
Broadcast: 209.191.151.255
Network range: 209.191.144.0 - 209.191.151.255
List of all IP addresses: 209_191_144_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048