Your IP address:
Provider:
...

For example: 216.73.216.57

/
Input
Address: 157.239.16.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 10011101.11101111.00010000.00000000
Reserved: No
Result
Network: 157.239.16.0/21 (Class B)
First IP: 157.239.16.1
Last IP: 157.239.23.254
Broadcast: 157.239.23.255
Network range: 157.239.16.0 - 157.239.23.255
List of all IP addresses: 157_239_16_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048