Tips - MAC addresses and producer correlation, subnet calculator and

Due to MAC address that is used from an ethernet device you could have opportunity to determine some vendor information based on that.

For that purpose I am indicating a web site (there are plenty similar on the web) that can be used for this search purpose.

The same website has a simple form to calculate, from IP and subnet, all other useful network information:

If finally you need to understand which is the service associated to a port number you can review this link too: