Your IP address:
Provider:
...

For example: 18.223.111.48

/
Input
Address: 3.5.80.0
Netmask: 255.255.240.0 = 20
Inversion mask: 0.0.15.255
Binary: 00000011.00000101.01010000.00000000
Reserved: No
Result
Network: 3.5.80.0/20 (Class A)
First IP: 3.5.80.1
Last IP: 3.5.95.254
Broadcast: 3.5.95.255
Network range: 3.5.80.0 - 3.5.95.255
List of all IP addresses: 3_5_80_0-20.txt
Number of hosts: 4094
Number of IP addresses: 4096