Your IP address:
Provider:
...

For example: 18.220.190.128

/
Input
Address: 136.18.254.0
Netmask: 255.255.254.0 = 23
Inversion mask: 0.0.1.255
Binary: 10001000.00010010.11111110.00000000
Reserved: No
Result
Network: 136.18.254.0/23 (Class B)
First IP: 136.18.254.1
Last IP: 136.18.255.254
Broadcast: 136.18.255.255
Network range: 136.18.254.0 - 136.18.255.255
List of all IP addresses: 136_18_254_0-23.txt
Number of hosts: 510
Number of IP addresses: 512