netlupaFind the manufacturer of a MAC address
Enter a MAC address, or just its first six digits, to see which manufacturer registered it and what kind of address it is.
- Manufacturer
- Apple, Inc.
- Assigned block
- 00:03:93 (MA-L)
- Type
- Unicast (a single device)
- Administration
- Universal (assigned by the manufacturer)
- Colon-separated
- 00:03:93:12:34:56
- Hyphen-separated
- 00-03-93-12-34-56
- Cisco format
- 0003.9312.3456
- No separators
- 000393123456
- EUI-64 identifier
- 203:93ff:fe12:3456
- IPv6 link-local (SLAAC)
- fe80::203:93ff:fe12:3456
How to look up a MAC address vendor
Copy the device's MAC address: it is in the network settings, on the device label or in your router's list of connected devices.
Paste it as is and click «Look up». Any format works, and so do just the first six digits.
Check the manufacturer and the address type. If it says «local», the device is using a random MAC for privacy.
What a MAC address is
The MAC address identifies a network interface (Wi-Fi, Ethernet, Bluetooth) within its local network. It is 48 bits long, written as six pairs of hexadecimal digits: 00:1A:2B:3C:4D:5E. Unlike your IP, it never leaves your network: routers replace it at every hop, so a website never sees your MAC.
The first three bytes are the OUI (organizationally unique identifier), which the IEEE assigns to each manufacturer. The last three are numbered by the manufacturer for each card it produces. That is why the first six digits alone tell you who made it.
Random MACs: why your phone shows no manufacturer
For years now, iOS, Android, Windows and macOS have used a different random MAC on each Wi-Fi network so the device cannot be tracked from place to place. Those addresses have the «locally administered» bit set (the second least significant bit of the first byte), so their second digit is always 2, 6, A or E: for example, DA:A1:19:… or 3E:…
A local MAC belongs to no manufacturer, and the tool says so. If you need to identify a device on your network, turn off the private address for that network in its Wi-Fi settings or find it by name in your router.
MA-L, MA-M and MA-S blocks
The IEEE sells blocks in three sizes:
- MA-L (24-bit prefix): about 16.7 million addresses. This is the classic OUI of large manufacturers.
- MA-M (28 bits): just over a million addresses, for medium-sized manufacturers.
- MA-S (36 bits): 4,096 addresses, for small manufacturers and specific products.
When an OUI is split into smaller blocks, the manufacturer depends on the following digits. The tool always looks for the most specific block, so it tells apart the different companies sharing one OUI. The data comes from the public IEEE registry, stored on our own server.
From MAC to IPv6: EUI-64
Some systems build the host part of their IPv6 address from the MAC with the EUI-64 method: FF:FE is inserted in the middle of the address and the locally administered bit is flipped. So the MAC 00:03:93:12:34:56 gives the identifier 203:93ff:fe12:3456 and the link-local address fe80::203:93ff:fe12:3456.
Since that lets a device be tracked even when it changes networks, modern systems use random identifiers (temporary addresses or «privacy extensions»), but EUI-64 still shows up in routers, printers and network gear.
Frequently asked questions
Can a MAC address tell me who owns a device?
No. A MAC only says which company made the network card, not who owns the device. It cannot locate it either: it never travels beyond your local network.
Why is no manufacturer shown?
Most often it is a random (local) MAC, which belongs to no manufacturer. It may also be a hand-set MAC, a virtual machine with an unregistered prefix or a copy mistake.
How do I find my device's MAC address?
On Windows, with ipconfig /all («Physical Address»). On macOS and Linux, with ifconfig or ip link. On a phone, in Settings > Wi-Fi > the connected network (you will see the private address if it is enabled).
Can a MAC address be changed?
Yes. The burned-in MAC does not change, but the operating system can use another one, which is what random MACs do. That is why it is no security measure: Wi-Fi MAC filtering is easy to bypass.