OneTaskBy Tim King · Updated
MAC Address Vendor Lookup
OUI Lookup From the IEEE Registry for Any MAC Address Prefix
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How the MAC Vendor Prefixes works
This MAC address vendor lookup tells you which company made a network interface. The first six hex digits of a MAC address are its OUI, the prefix the IEEE assigns to each manufacturer, so an OUI lookup is a vendor lookup. Paste a full MAC address in any common format, type the prefix, or search for a company name, and the table shows the matching IEEE assignments with the organisation and its country. The whole registry downloads as CSV or JSON.
How a MAC address vendor prefix works
A MAC address is 48 bits, usually written as six pairs of hex digits such as 00:03:93:4A:1B:2C. The first three pairs are the organisationally unique identifier, or OUI, which the IEEE Registration Authority sells to hardware makers. The last three pairs are the maker's own serial space. So the first half of any factory-assigned MAC address names the company that built the network chip or the device around it.
What the table holds
This table is the IEEE's MA-L list: the large blocks of 16.7 million addresses each. Every row gives the prefix, the organisation name exactly as registered, and the two-letter country code taken from the registered address. A single company often holds hundreds of prefixes, bought as it ran out of addresses, and some rows name the chip maker rather than the brand on the box, because the address was burned in at the chip factory.
Searching
Type a prefix with or without separators — 000393, 00-03-93 and 00:03:93 all work — or paste a whole MAC address and the table finds the prefix it starts with. Type part of a company name to see every block it owns. The page shows the first 200 matches; the downloads always hold every row.
Randomised and private addresses
Phones and laptops now use a random MAC address on each Wi-Fi network for privacy. Those addresses set the locally administered bit — the second hex digit is 2, 6, A or E — and belong to no vendor, so they will not appear here. Rows marked Private are blocks whose owners paid the IEEE to keep their name off the public list.
FAQ
How do I find the manufacturer from a MAC address?
Paste the address into the search box. The table matches the first six hex digits against the IEEE registry and shows the company it was assigned to. If nothing matches, the address is probably randomised or locally administered rather than burned in by a manufacturer.
Why does my Apple or Samsung device show a different company?
Some devices carry an address from the company that made the network chip, such as Intel, Broadcom or Murata, rather than the brand on the case. Others show no match at all because the operating system used a random private address on that network.
How often is the IEEE OUI list updated?
The IEEE adds new assignments every week. This table was built from the registry file on the date shown under the table, and the downloads are refreshed at the same address, so check the retrieval date if you are looking for a block assigned very recently.
See also: all Tech Data tools, Everyday Data.
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