Open Command Prompt, run ipconfig /all, and look for Physical Address under the active adapter.
Step by Step
- Open Command Prompt.
- Type ipconfig /all and press Enter.
- Find the active Wi-Fi or Ethernet adapter.
- Look for Physical Address.
- Alternatively, use Settings → Network & internet → your connection → Hardware properties.
If That Doesn't Work
- A computer can have several MAC addresses because each network adapter has its own.
- Some devices use randomized/private Wi-Fi addresses, so the address seen by a router may differ in some situations.