Your IP address:
Provider:
...

For example: 18.220.190.128

/
Input
Address: 66.133.192.0
Netmask: 255.255.192.0 = 18
Inversion mask: 0.0.63.255
Binary: 01000010.10000101.11000000.00000000
Reserved: No
Result
Network: 66.133.192.0/18 (Class A)
First IP: 66.133.192.1
Last IP: 66.133.255.254
Broadcast: 66.133.255.255
Network range: 66.133.192.0 - 66.133.255.255
List of all IP addresses: 66_133_192_0-18.txt
Number of hosts: 16382
Number of IP addresses: 16384