Your IP address:
Provider:
...

For example: 3.147.54.242

/
Input
Address: 66.245.128.0
Netmask: 255.255.224.0 = 19
Inversion mask: 0.0.31.255
Binary: 01000010.11110101.10000000.00000000
Reserved: No
Result
Network: 66.245.128.0/19 (Class A)
First IP: 66.245.128.1
Last IP: 66.245.159.254
Broadcast: 66.245.159.255
Network range: 66.245.128.0 - 66.245.159.255
List of all IP addresses: 66_245_128_0-19.txt
Number of hosts: 8190
Number of IP addresses: 8192