Your IP address:
Provider:
...

For example: 216.73.216.51

/
Input
Address: 149.28.0.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 10010101.00011100.00000000.00000000
Reserved: No
Result
Network: 149.28.0.0/21 (Class B)
First IP: 149.28.0.1
Last IP: 149.28.7.254
Broadcast: 149.28.7.255
Network range: 149.28.0.0 - 149.28.7.255
List of all IP addresses: 149_28_0_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048