Identify the manufacturer of any network device by its MAC address or OUI.
Enter a MAC address or OUI to identify the vendor
A MAC address (Media Access Control address) is a unique 48-bit identifier assigned to every network interface - Ethernet ports, Wi-Fi adapters, Bluetooth chips. It is written as six pairs of hexadecimal digits separated by colons or hyphens (e.g. B8:27:EB:12:34:56).
The first three octets form the OUI (Organisationally Unique Identifier), which the IEEE assigns to each hardware manufacturer. Looking up the OUI reveals who made the device - useful for identifying unknown devices on your network, debugging DHCP leases, or verifying hardware authenticity.
Locally administered addresses (bit 1 of the first octet set to 1) are assigned by software rather than manufacturers. Modern operating systems, Docker, and virtual machines commonly use these - no OUI lookup applies. Multicast addresses (bit 0 set to 1) are used for group communication, not individual devices.
You can enter a full MAC address or just the first three octets (OUI). All common formats are accepted: colon-separated (B8:27:EB:12:34:56), hyphen-separated (B8-27-EB-12-34-56), or bare hex (B827EB123456).
Sent to our server: MAC address and Company name. We compare it with lists we keep, and ask no one else. To stop abuse, we have to keep a count of your checks for up to 90 minutes; then it is deleted. Also added to the page link, so you can share the result: A single MAC address (not a list or a company name).