$ mac vendor lookup
Find the manufacturer of a network interface from its MAC address, using the IEEE registry (MA-L, MA-M, MA-S and CID assignments). Paste one address or up to 50, in any format (aa:bb:cc:dd:ee:ff, aa-bb-cc-dd-ee-ff, aabb.ccdd.eeff, or just the first 6 digits). Also shows the other notations and whether the address is randomized or multicast.
About the mac tool
The MAC vendor lookup identifies the manufacturer of a network interface from its MAC (hardware) address. The first three bytes, the OUI, are assigned to a vendor by the IEEE; longer blocks (MA-M and MA-S) are shared between smaller companies. This tool searches a snapshot of the IEEE registries and accepts one address or up to 50 at a time in any common notation.
How to read the results
The vendor is whoever registered the prefix, which is usually the maker of the network chip or module rather than the brand on the device. Addresses with the locally administered bit set (second hex digit 2, 6, A or E) are randomized or virtual, for example the private Wi-Fi addresses on modern phones, so they have no vendor. The multicast bit marks group addresses.
FAQ
- How do I find who made a device from its MAC address?
- Paste the address (or just the first six hex digits) and run the lookup; the registered vendor of that prefix is shown.
- Why does my phone show no vendor?
- Phones and laptops use a randomized, locally administered MAC per Wi-Fi network for privacy. Those addresses are not in the IEEE registry.
- What is the difference between aa:bb:cc, aa-bb-cc and aabb.cc formats?
- Only the notation: colons are common on Linux and macOS, hyphens on Windows and dots on Cisco gear. The tool shows all three.
- How current is the database?
- It is a snapshot of the IEEE MA-L, MA-M, MA-S and CID registries; the snapshot date is shown under the results.