What a MAC address tells you
Every network device carries a MAC address like 28:6F:B9:12:34:56. The first half, called the OUI (Organizationally Unique Identifier), is assigned by the IEEE to a specific manufacturer. Looking it up reveals who made the network hardware, useful for auditing devices on a network, spotting rogue hardware, or identifying an unknown gadget by the MAC shown in your router.
MacVendorCheck reads the official IEEE MA-L, MA-M and MA-S registries, refreshed monthly. There is also a free JSON API and, for network folk, our sibling IP address lookup. Need more than 100 requests a day? A free IPNOVA API key at api.ipnova.com gives you 30,000 lookups a month and 60 a minute. Get an IPNOVA API key.
Frequently Asked Questions
How do I find the vendor of a MAC address?
Enter the MAC address above. The first half (the OUI) is matched against the IEEE registry to reveal the manufacturer that was assigned that block.
Can a website read my device MAC address?
No. A MAC address is only visible on the local network, not to websites. This tool looks up any MAC you type in; it cannot read your device automatically.