MAC Vendor Lookup
Look up manufacturer by MAC address OUI
Local IEEE MA-L/OUI snapshot; addresses are not sent to a lookup service.
Vendor results appear here.
About this tool
Looks up the registered organization for a globally administered EUI-48 address using its first 24-bit MA-L/OUI prefix. The IEEE-derived snapshot is loaded locally in the browser. Locally administered or newer non-MA-L assignments may not have a match.
Frequently Asked Questions
What part of a MAC address is used?
The lookup uses the first 24 bits, known as the MA-L or OUI prefix, to identify a registered organization.
Does it query a live vendor service?
No. It searches a bundled IEEE-derived snapshot locally, so the lookup does not send the address to a third party.
Why might a valid MAC have no vendor match?
Locally administered addresses, newer assignments, randomized Wi-Fi addresses, and non-MA-L ranges may not appear in the snapshot.
Can I paste colon or hyphen formatted addresses?
Yes. Common colon, hyphen, dotted, and unseparated EUI-48 formats are normalized before lookup.
Does a vendor match prove device ownership?
No. It indicates the registered prefix organization, not the owner, model, network location, or current device identity.
Can I look up multiple MAC addresses?
Yes. Paste one address per line to review a batch of normalized addresses and their available organizations.
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