Your IP address:
Provider:
...

For example: 3.238.135.30

/
Input
Address: 139.73.224.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 10001011.01001001.11100000.00000000
Reserved: No
Result
Network: 139.73.224.0/21 (Class B)
First IP: 139.73.224.1
Last IP: 139.73.231.254
Broadcast: 139.73.231.255
Network range: 139.73.224.0 - 139.73.231.255
List of all IP addresses: 139_73_224_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048