Your IP address:
Provider:
...

For example: 3.135.198.49

/
Input
Address: 66.150.16.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 01000010.10010110.00010000.00000000
Reserved: No
Result
Network: 66.150.16.0/21 (Class A)
First IP: 66.150.16.1
Last IP: 66.150.23.254
Broadcast: 66.150.23.255
Network range: 66.150.16.0 - 66.150.23.255
List of all IP addresses: 66_150_16_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048