Up to 100 random MAC addresses with an optional OUI prefix, colon, dash or no separator, upper or lower case.
MAC OUI Lookup
Runs locally
Use MAC OUI Lookup
What it does
Enter a MAC address to see its OUI prefix and, if it is in the built-in list of 40 prefixes, the vendor. The list leans towards virtual machines (VMware, VirtualBox, QEMU/KVM, Hyper-V, Xen), the same prefixes malware looks for to detect an analysis sandbox.
It runs entirely in your browser: nothing you enter is uploaded.
Example
VirtualBox network adapter
08-00-27-4E-66-A1OUI PREFIX
08:00:27
VENDOR
Oracle VirtualBox
FULL MAC
08:00:27:4E:66:A1
Local lookup only — covers ~40 common vendors. For full IEEE OUI database, use an online service.Prefix 08:00:27, vendor Oracle VirtualBox: the default range for VirtualBox network adapters.
FAQ
How does the lookup work?
It takes the first three bytes (the OUI) of a MAC written with colons or hyphens and matches them against 40 prefixes stored in the page: mostly VMware, VirtualBox, QEMU/KVM, Hyper-V, Xen and Parallels, plus some Apple, Dell, Intel, Raspberry Pi and other hardware. Anything else shows Unknown.
Why is my device Unknown or the vendor wrong?
The list is tiny compared with the IEEE registry and a few of its hardware entries do not match current IEEE data, so confirm important results in the IEEE MA-L database. Phones and laptops often use randomised MACs (second hex digit 2, 6, A or E) that belong to no vendor, and dotted (0800.274e.66a1) or unseparated formats are not parsed.
Is the MAC address sent to an online database?
No. The prefix is matched against the list built into the page; nothing is looked up online.