Your IP address:
Provider:
...

For example: 3.146.105.194

/
Input
Address: 142.4.184.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 10001110.00000100.10111000.00000000
Reserved: No
Result
Network: 142.4.184.0/21 (Class B)
First IP: 142.4.184.1
Last IP: 142.4.191.254
Broadcast: 142.4.191.255
Network range: 142.4.184.0 - 142.4.191.255
List of all IP addresses: 142_4_184_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048