Enter a MAC address to identify its vendor.
Paste any MAC address in colon, hyphen, or dot notation — we'll find the registered manufacturer (OUI).
Accepts colon, hyphen, dot, or plain hex formats. The OUI (first 3 bytes) determines the vendor.
Four steps, one vendor name.
No account, no waiting — here's the entire flow.
Copy a MAC address
Grab it from your device settings, router admin panel, or a network scan tool. Any common format works.
Paste it in
Drop it into the field above, or tap one of the quick-example chips to try a known OUI.
Hit lookup
Press the Lookup button or hit Enter. Results appear instantly — the OUI is matched locally.
Read the vendor
See the manufacturer, OUI details, address type, and more. Copy a plain-text summary with one tap.
Three groups of detail, every lookup.
Each result covers who made the hardware, what kind of address it is, and how it's structured.
Vendor information
The organization that the IEEE assigned this OUI prefix to — the actual maker of the network chip.
Address structure
A MAC address is split into the manufacturer prefix and the device-specific portion. We show both.
Address type & flags
Whether the address is unicast or multicast, and whether it's universally (factory) or locally administered.
Questions people actually ask.
The short answers — with the long ones one tap away.
What is a MAC address lookup?+
A MAC address lookup takes a hardware address (like 00:1A:2B:3C:4D:5E) and returns the manufacturer or vendor it was assigned to. The first half of a MAC address is the OUI (Organizationally Unique Identifier), which is registered to a specific company.
What is an OUI?+
OUI stands for Organizationally Unique Identifier. It's the first 24 bits (3 bytes) of a MAC address, assigned by the IEEE to a specific manufacturer. Every device from that vendor shares the same OUI prefix.
Can I look up any MAC address format?+
Yes. The tool accepts colon-separated (00:1A:2B:3C:4D:5E), hyphen-separated (00-1A-2B-3C-4D-5E), and dot-separated (001A.2B3C.4D5E) formats, as well as plain hex strings.
Does this tool show the exact device or owner?+
No. A MAC address lookup identifies the manufacturer of the network chip — not the specific device, owner, or location. It's useful for identifying hardware vendors, not tracking people.
What does 'locally administered' mean?+
A locally administered MAC address is one that has been changed from the factory default. The second least significant bit of the first byte is set to 1, meaning the address was assigned by software rather than burned into the hardware by the manufacturer.
Is this tool free, and is my lookup stored anywhere?+
It's completely free with no account needed. The MAC address you enter is looked up locally in your browser against a public OUI database — nothing is sent to or stored by StudyWithSTEM.