That IP address is internal (i.e. within your own private home network as opposed to external/internet) and sounds like the gateway address of your router. It’s easy to check. In a command prompt, enter the command ipconfig /all. The result will show you your ‘gateway’ address (as in ‘gateway to the internet’).
Enter another command - arp -a - and you’ll see all the IP addresses used within your private network. Look alongside the ‘Internet Address’ for 10.1.19.1 and you’ll see the ‘Physical Address’, i.e. the MAC address of the network interface you are interested in.
You can use the MAC Address Vendor database to double-check the manufacturer of the network interface.
Hope this helps…