MAC Address Vendor Lookup - Find the Manufacturer from a MAC or OUI
MAC Address Vendor Lookup
Find which company a network card or device belongs to from its MAC address
The Full IEEE Registry
Covers the 24-bit (MA-L), 28-bit (MA-M) and 36-bit (MA-S) assignments, so small blocks resolve to the right company.
Bulk Lookups
Paste up to 50 addresses in any mix of formats and copy the results as a table for a spreadsheet.
Spots Random Addresses
Phones and laptops often use a made-up address for privacy; the tool tells you when that is why nothing was found.
Only the Prefix Matters
The vendor comes from the first 6 to 9 digits, so you can paste just an OUI and not a full device address.
How a MAC Address Names Its Maker
A MAC address is 48 bits, usually written as six pairs of hex digits. The IEEE Registration Authority sells blocks of addresses to manufacturers: a 24-bit prefix, called an OUI, for large blocks, and longer 28-bit and 36-bit prefixes for smaller ones. Everything after the prefix is the maker's own serial numbering, so the prefix identifies the company that bought the block, not the model of the device.
Two bits in the first byte carry meaning of their own. If the second-lowest bit is set, the address is locally administered: it was made up by software rather than assigned at the factory, as phones and operating systems do to stop tracking, and virtual machines and containers do by default. Such addresses are not in the registry, so an empty result for one is expected. A vendor name also says little about the current device: cards are resold, chips are reused, and addresses can be changed by the user.
Key Takeaways
- Data source: The IEEE public registry, snapshot of 30 September 2026, kept on this site's server.
- Privacy: The addresses you enter are sent to this site's server to search the registry and are not stored.
- Related tools: See also the MAC Address Formatter and the IPv6 ULA Generator.