Your IP address:
Provider:
...

For example: 18.218.129.100

/
Input
Address: 45.72.0.0
Netmask: 255.255.128.0 = 17
Inversion mask: 0.0.127.255
Binary: 00101101.01001000.00000000.00000000
Reserved: No
Result
Network: 45.72.0.0/17 (Class A)
First IP: 45.72.0.1
Last IP: 45.72.127.254
Broadcast: 45.72.127.255
Network range: 45.72.0.0 - 45.72.127.255
List of all IP addresses: 45_72_0_0-17.txt
Number of hosts: 32766
Number of IP addresses: 32768