Open Command Prompt and run arp -a to view the local ARP table.
Step by Step
- Open Command Prompt.
- Type arp -a and press Enter.
- Look under the interface for your local network.
- Compare Internet Address entries with the devices on your network.
- Use your router's connected-device list when you need a more complete inventory.
If That Doesn't Work
- The ARP table does not necessarily show every device on the network.
- Device names and MAC addresses shown by your router can help identify unknown entries.