MAC Address Vendor Lookup
Find the manufacturer behind any MAC address (OUI lookup). Identify unknown devices on your Wi-Fi by their hardware address — free and instant.
Identify devices by MAC address
The first half of every MAC address (the OUI) is assigned to a manufacturer by the IEEE. Looking it up answers the eternal question of home networking: what is that unknown device on my Wi-Fi? Grab MACs from your router's connected-devices page or arp -a, and paste them here.
Note that modern phones use randomised MAC addresses per network for privacy — those resolve to no vendor by design, and the tool flags them. Background reading: MAC vs IP addresses and how ARP pairs the two.
Frequently asked questions
Why does my phone's MAC show no vendor?
iOS and Android present a randomised address to each Wi-Fi network (a privacy feature), and randomised addresses aren't in the manufacturer registry. The device's real MAC is visible in its settings.
Can a MAC address be traced to a person?
No — it identifies the hardware model's maker, nothing personal. It also never leaves your local network, unlike your IP.