Free MAC Address Vendor Lookup

An OUI (Organizationally Unique Identifier) is the first 3 octets of a MAC address that identify the manufacturer.

Over 200 well-known OUI prefixes including Apple, Intel, Cisco, Samsung, and more.

Yes, completely free.

Yes, the MAC Address Vendor Lookup is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the MAC Address Vendor Lookup in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The MAC Address Vendor Lookup works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

The distinction is decoded from the least-significant bit of the first octet of a MAC address. When that bit is 0 the address is unicast, meaning it identifies one specific network interface and frames sent to it reach a single device. When the bit is set (0x01) the address is multicast, so a frame is delivered to every device that has joined that group — protocols like IPv4 multicast and IPv6 neighbor discovery rely on it. The all-ones address ff:ff:ff:ff:ff:ff is a special multicast case used for broadcast to everyone on the segment. Because the flag lives in the very first byte, you can tell unicast from multicast just from the OUI prefix. Paste any address into this lookup and the Address Type field reports unicast or multicast for you automatically.

Modern phones and laptops use MAC randomization for privacy: instead of broadcasting the permanent hardware address burned into the network card, the operating system generates a random, locally administered address for each network you join. This stops networks and trackers from following you across locations by your unchanging MAC. You can spot a randomized address because the second bit of the first octet (0x02) is set, marking it Locally Administered (LAA) rather than Universally Administered (UAA). Randomized addresses deliberately carry no real vendor identity, so a lookup will usually return Unknown for them. That is expected, not a tool error. Enter the address here and check the Administration field — an LAA result is a strong sign you are looking at a randomized or virtual interface rather than the device's factory address.

You only need the first three octets — the OUI, or Organizationally Unique Identifier — to identify a manufacturer, because the IEEE assigns those six hex characters in blocks to specific companies. The last three octets are chosen by the vendor to make each interface unique and tell you nothing about the maker. So an input like 00:1A:2B is enough; you do not need the full six-pair address. This tool strips out every separator and non-hex character before matching, so colons, hyphens, dots, or no separators at all work equally well. It then normalizes the OUI into clean colon-separated form and reports the registered company when the prefix is in its database of Apple, Intel, Cisco, Samsung, Google, and 200-plus other common vendors. Just paste the prefix above and press Lookup.

An Unknown result means the OUI prefix is not among this tool's bundled set of common vendors — it does not mean the address is invalid or fake. The full IEEE registry holds tens of thousands of OUIs covering every manufacturer worldwide, while this lookup ships a focused database of roughly 200-plus well-known vendors so it can run instantly in your browser with no server call. Less common, newly assigned, or niche hardware makers may not be included. The other frequent cause is MAC randomization: a locally administered address has no vendor at all by design, so it will always show Unknown. Check the Administration field — if it reads Universally Administered the prefix is simply outside the bundled list; if it reads Locally Administered the address is randomized. Try the prefix here to see both the vendor and the address flags at once.

A MAC address is a 48-bit hardware identifier written as six pairs of hex digits, and it reveals more than just a device name. The first three octets, the OUI, identify the manufacturer that built the network interface — useful for matching an unknown client on a DHCP lease list or Wi-Fi scan to real hardware like a printer, Raspberry Pi, or smart speaker. The first byte also encodes two flags: whether the address is unicast or multicast, and whether it is universally or locally administered. A locally administered address often signals MAC randomization, a virtual machine, or spoofing. What a MAC address cannot tell you is the device's location, owner, or IP — it is purely a hardware label. This tool surfaces the vendor, OUI, address type, and administration flag together, so enter an address above to read all four at once.