Network
The first bytes can tell you who asked IEEE for the block.
MAC Lookup
Loading local IEEE data.
About this tool
What a MAC address tells you
A MAC address is 48 bits, usually written as six pairs of hex digits. The first three bytes are the OUI (Organizationally Unique Identifier), which the IEEE assigns to a manufacturer. Looking up the OUI tells you who made the network interface, which is handy for identifying unknown devices on a switch port, DHCP lease table or ARP cache.
Accepted formats
AA:BB:CC:DD:EE:FF, AA-BB-CC-DD-EE-FF, aabb.ccdd.eeff (Cisco style) and AABBCCDDEEFF all work. A partial address of at least the first three bytes is enough to find the vendor.
FAQ
Why does my phone show no vendor, or the wrong one? Many phones and laptops use randomized private MAC addresses per network. These have the locally administered bit set (the second hex digit is 2, 6, A or E), so they do not belong to any manufacturer's OUI.
Does the lookup send my MAC address anywhere? No. The vendor database is loaded into your browser and the lookup happens locally.