Your IP address:
Provider:
...

For example: 18.223.106.114

/
Input
Address: 143.220.128.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 10001111.11011100.10000000.00000000
Reserved: No
Result
Network: 143.220.128.0/21 (Class B)
First IP: 143.220.128.1
Last IP: 143.220.135.254
Broadcast: 143.220.135.255
Network range: 143.220.128.0 - 143.220.135.255
List of all IP addresses: 143_220_128_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048