|It sounds like you're confusing a MAC address in the router's configuration with the MAC address of the wireless network adapter, or you're confusing a MAC address with an IP address. |
You CANNOT change the MAC address of the wireless (or wired) network adapter (unless you alter the read only data on the adapter - something you normally can't do) - that's unique to the adapter - but you CAN change the MAC address of the router in the router's configuration to be other than the default for the router, by either entering the MAC address manually, or by cloning the MAC address of a network adapter that's connected to the router by itself.
Whatever the MAC address the router is using is, is the one the ISP can "see" and anyone who accesses the router from the internet can "see".
That MAC address of the router DOES NOT show up when you run ipconfig /all .
When you run ipconfig /all.....
Physical address = the MAC address of the network adapter.
If you have both a wired and a wireless network adapter, and if both have had their drivers installed and both are enabled in device manager, there will be two network adapters listed, each with it's own Physical address.
IP address = the address of the ISP's server if you're connected directly to a stand-alone high speed modem (possible with a wired internet connection but not possible with a wireless one) , or the IP address assigned by the router, if you're connected to the internet through a standalone router connected to a standalone high speed modem, or through a combo router / high speed modem - 192.168.xxx.xxx, the last xxx being unique to each network adapter device that's connected to the router .
However, you can change the IP address of the router in the router's configuration to some other 192.168.xxx.xxx number other than the default one.