Your IP address:
Provider:
...

For example: 3.147.104.120

/
Input
Address: 31.223.200.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 00011111.11011111.11001000.00000000
Reserved: No
Result
Network: 31.223.200.0/21 (Class A)
First IP: 31.223.200.1
Last IP: 31.223.207.254
Broadcast: 31.223.207.255
Network range: 31.223.200.0 - 31.223.207.255
List of all IP addresses: 31_223_200_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048