Only your Internet Service Provider (ISP) can detect the MAC address of your modem or router. One thing you should know is the MAC address on your computer’s network card will not get passed out to the Internet so there is no way a website or an Internet server can capture this information. To view your network card’s MAC address, just run the command “ ipconfig /all” in command prompt and refer to the value of Physical Address. Although these information can be configured to have the same, it would cause conflict and connection problems.
Every network card contains a unique code called MAC address that is permanently assigned to it, similarly like every computer requires a unique IP address to be connected to a network.
