Netcalc is a tornado application that calculates network information based on user input. The user can access a form that upon submit provides a table with network information for the IP and subnet mask entered. This form is available at /netcalc.
A user can also post JSON to /netcalc/api. The following is an example payload:
{"ip":"192.168.15.5", "netmask":"255.255.252.0"}
The output for the above request would be:
{"network_id": "192.168.12.0", "net_cidr": "192.168.12.0/22", "network_range": "192.168.12.0-192.168.15.255"}
You can sample the application at: