Your IP address:
Provider:
...

For example: 35.175.174.36

/
Input
Address: 3.5.128.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 00000011.00000101.10000000.00000000
Reserved: No
Result
Network: 3.5.128.0/21 (Class A)
First IP: 3.5.128.1
Last IP: 3.5.135.254
Broadcast: 3.5.135.255
Network range: 3.5.128.0 - 3.5.135.255
List of all IP addresses: 3_5_128_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048