MAC address lookup
The vendor behind a MAC address, from the IEEE registry.
Any form: colons, hyphens, dots or none; up to 100 addresses, one per line (Shift+Enter starts a new one). On Look up, or when you pick an example, only the first 6 hex digits of each (the vendor prefix) are sent to our server, once per prefix.
Try
Vendor
waiting for an address…
About this tool
- Runs in
- our server
- Your input sent to our servers
- The vendor prefix only: the first 6 hex digits of the MAC address
- Kept on this device
- nothing
More in the privacy policy.
How to use it
- 01Type or paste a MAC address in any form: 00:1A:2B:3C:4D:5E, 00-1A-2B-3C-4D-5E, 001A.2B3C.4D5E or 001A2B3C4D5E. The first 6 hex digits are enough. Or pick one under Try. For several, put one per line, up to 100 (paste a list, or Shift+Enter starts a new line).
- 02Press Look up (or Enter); picking an example looks it up straight away. The organisation the address is registered to appears with its country and block, and what the address itself says: unicast or multicast, set by the manufacturer or by software.
- 03Copy the vendor name, or the address in the form you need. Several addresses give a table of address, vendor, country and block; Copy all copies it as tab-separated text.
Related tools
Questions
Where does the vendor come from?
From the IEEE Registration Authority public listing, the registry that hands out MAC address blocks to manufacturers. Our copy holds 58,710 assignments, and its date is shown under each result. The listing names the organisation that registered the block; a device can carry a part made by that organisation inside another brand’s product.
Why does it say “Locally administered”?
The second-lowest bit of the first byte is set (the address starts with x2, x6, xA or xE), so software chose the address, not a manufacturer. Phones and computers use random addresses like this on Wi-Fi to avoid being tracked, and virtual machines and containers get them too. Such an address has no vendor.
What are MA-L, MA-M and MA-S?
The block sizes IEEE assigns. MA-L (a large block) gives an organisation the first 24 bits, enough for about 16.7 million addresses; MA-M the first 28 bits (about a million); MA-S and the older IAB the first 36 bits (4,096). For the smaller blocks the page needs more of the address than the first 6 digits, and it says so.
What is sent to your server?
Only the first 6 hex digits, the vendor prefix, when you press Look up or pick an example, in the body of the request (not the page address), and once per prefix while the page is open; with several addresses, each distinct prefix is sent once, one request at a time. The rest of the address, which identifies the device, stays in your browser: our server answers with every block under that prefix and the page picks the match itself. Our server doesn’t keep a log of these requests.
Why is a vendor missing?
The block may not be assigned yet (IEEE divides some of its own prefixes, such as 70:B3:D5, into small blocks, and not all are taken), it may be newer than our copy of the listing, or the organisation may have chosen a private listing, which shows as “Private”.