Your IP address:
Provider:
...

For example: 3.145.47.253

/
Input
Address: 31.223.192.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 00011111.11011111.11000000.00000000
Reserved: No
Result
Network: 31.223.192.0/21 (Class A)
First IP: 31.223.192.1
Last IP: 31.223.199.254
Broadcast: 31.223.199.255
Network range: 31.223.192.0 - 31.223.199.255
List of all IP addresses: 31_223_192_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048