Your IP address:
Provider:
...

For example: 3.145.47.253

/
Input
Address: 72.5.128.0
Netmask: 255.255.240.0 = 20
Inversion mask: 0.0.15.255
Binary: 01001000.00000101.10000000.00000000
Reserved: No
Result
Network: 72.5.128.0/20 (Class A)
First IP: 72.5.128.1
Last IP: 72.5.143.254
Broadcast: 72.5.143.255
Network range: 72.5.128.0 - 72.5.143.255
List of all IP addresses: 72_5_128_0-20.txt
Number of hosts: 4094
Number of IP addresses: 4096