MAC Address Lookup
Enter a MAC address or its first three hexadecimal bytes to check this browser-only reference list of selected OUI examples.
A QUICK WALKTHROUGH
How to use this tool
- Enter a MAC address such as 00:1A:2B:3C:4D:5E, or enter a three-byte prefix.
- Choose Look up prefix to normalize separators and compare the first six hexadecimal characters.
- Read the listed example vendor, or the explicit unknown result when this small reference does not contain the prefix.
A small local reference
This page includes only a few common illustrative OUI prefixes. It is not a complete IEEE registry, vendor database, or device identification service, and a listed label should not be treated as proof of who made a particular device.
Unknown means unknown here
An unlisted or malformed prefix returns an explicit unknown result. The page does not guess from nearby prefixes, query a remote service, or identify the model, owner, location, or security of a device.
Formatting is flexible
Enter six hexadecimal characters or a MAC address with colons, hyphens, dots, or spaces. Only the first three bytes are used for this local prefix comparison.
GOOD TO KNOW
Common questions
Is this a complete OUI database?
No. It is a small local set of common examples for a quick demonstration. Use the current IEEE registry or a vetted data source when complete or authoritative coverage matters.
What does an unknown result mean?
It means the normalized first three bytes are not present in this page’s small reference. It does not prove that the address is invalid or that a vendor cannot be found elsewhere.
Does the lookup send my MAC address anywhere?
No. Normalization and comparison run in your browser and make no network request.