MAC Address Lookup
Find the manufacturer of a network device from its MAC address, using the official IEEE registry.
Frequently asked questions
What is a MAC address?
A MAC (media access control) address is a 48-bit hardware identifier for a network interface, written as six pairs of hex digits such as 00:1B:63:84:45:E6. It is used on the local network to deliver frames to the right device.
How does a MAC vendor lookup work?
The first 24 bits of a MAC address, called the OUI, identify the organization that bought the block from the IEEE. This tool looks the prefix up in the IEEE public registry. It also checks the longer 28-bit and 36-bit blocks that the IEEE sells to smaller vendors, so shared blocks resolve to the right company.
Which MAC address formats can I enter?
Colons (00:1B:63:84:45:E6), hyphens (00-1B-63-84-45-E6), Cisco style dots (001b.6384.45e6) or no separators. You can also enter only the first 6 digits.
Why does my phone show a "locally administered" address?
Modern iPhone, Android and Windows devices use a randomized private MAC for each Wi-Fi network to stop tracking. These addresses have the second-least-significant bit of the first byte set (the second hex digit is 2, 6, A or E) and belong to no manufacturer.
Why does the result say IEEE Registration Authority?
The IEEE keeps some 24-bit blocks to divide among many small companies. Enter the full MAC, or at least 9 hex digits, to resolve the actual owner. If it still shows the IEEE, that part is private or unassigned.
Can I find where a device is from its MAC address?
No. A MAC address identifies the manufacturer of the network chip, not the location or the person using it. It is also only visible on the local network segment, and it can be changed in software.
How current is the data?
The registry was last downloaded on the date shown with each result. The IEEE adds new assignments continuously, so a very new device can be missing from the list.