Your IP address:
Provider:
...

For example: 3.15.10.137

/
Input
Address: 188.230.64.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 10111100.11100110.01000000.00000000
Reserved: No
Result
Network: 188.230.64.0/21 (Class B)
First IP: 188.230.64.1
Last IP: 188.230.71.254
Broadcast: 188.230.71.255
Network range: 188.230.64.0 - 188.230.71.255
List of all IP addresses: 188_230_64_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048