Your IP address:
Provider:
...

For example: 216.73.216.51

/
Input
Address: 156.37.128.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 10011100.00100101.10000000.00000000
Reserved: No
Result
Network: 156.37.128.0/21 (Class B)
First IP: 156.37.128.1
Last IP: 156.37.135.254
Broadcast: 156.37.135.255
Network range: 156.37.128.0 - 156.37.135.255
List of all IP addresses: 156_37_128_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048