Your IP address:
Provider:
...

For example: 3.81.221.121

/
Input
Address: 130.176.21.0
Netmask: 255.255.255.0 = 24
Inversion mask: 0.0.0.255
Binary: 10000010.10110000.00010101.00000000
Reserved: No
Result
Network: 130.176.21.0/24 (Class B)
First IP: 130.176.21.1
Last IP: 130.176.21.254
Broadcast: 130.176.21.255
Network range: 130.176.21.0 - 130.176.21.255
List of all IP addresses: 130_176_21_0-24.txt
Number of hosts: 254
Number of IP addresses: 256