Your IP address:
Provider:
...

For example: 216.73.216.57

/
Input
Address: 157.239.0.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 10011101.11101111.00000000.00000000
Reserved: No
Result
Network: 157.239.0.0/21 (Class B)
First IP: 157.239.0.1
Last IP: 157.239.7.254
Broadcast: 157.239.7.255
Network range: 157.239.0.0 - 157.239.7.255
List of all IP addresses: 157_239_0_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048