Your IP address:
Provider:
...

For example: 18.117.81.240

/
Input
Address: 129.224.0.0
Netmask: 255.255.128.0 = 17
Inversion mask: 0.0.127.255
Binary: 10000001.11100000.00000000.00000000
Reserved: No
Result
Network: 129.224.0.0/17 (Class B)
First IP: 129.224.0.1
Last IP: 129.224.127.254
Broadcast: 129.224.127.255
Network range: 129.224.0.0 - 129.224.127.255
List of all IP addresses: 129_224_0_0-17.txt
Number of hosts: 32766
Number of IP addresses: 32768