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MAC Address Lookup
Find the manufacturer behind any MAC address or OUI, check a whole list at once, and see whether an address is a randomized private one.
About MAC Lookup
A MAC address lookup finds the company behind a network device from the first part of its MAC address. Every Ethernet and Wi-Fi interface has a 48-bit hardware address, and IEEE assigns the leading 24, 28 or 36 bits to organizations in blocks called MA-L, MA-M and MA-S. Use this tool to identify an unknown device on your network, check the hardware in a router's client list, or read the vendor of an access point. It also decodes the address itself: unicast or multicast, universally or locally administered (the sign of a randomized private address), every common format, and the IPv6 link-local address derived from it.
How to read a MAC address
A MAC address is six bytes, usually written as twelve hexadecimal digits such as B8:27:EB:12:34:56, B8-27-EB-12-34-56 or the Cisco style b827.eb12.3456. The first part is the block IEEE assigned to an organization, and the rest is chosen by that organization for each device. Two bits in the first byte have special meanings, as IEEE's guidelines describe: the lowest bit marks a group (multicast) address, and the next bit marks a locally administered address that was not assigned by a manufacturer.
| Block | Prefix length | Example prefix |
|---|---|---|
| MA-L (formerly OUI) | 24 bits, 6 hex digits | B8:27:EB |
| MA-M | 28 bits, 7 hex digits | 00:69:67:A |
| MA-S (and the older IAB) | 36 bits, 9 hex digits | 00:1B:C5:07:4 |
Smaller companies often get an MA-M or MA-S block inside a 24-bit prefix shared with other organizations. This tool checks all three registries, longest match first, so it names the right company where a lookup that only reads the first six digits would not.
Randomized and private MAC addresses
Modern phones hide their hardware address on Wi-Fi. Android 10 and later use a randomized MAC by default and set the locally administered bit, according to Android's documentation. Apple devices running iOS 14 or later use a different private Wi-Fi address for each network, and from iOS 18 you can choose a fixed or a rotating private address. If a device on your network shows an address whose second digit is 2, 6, A or E, it is almost certainly one of these, and its real manufacturer cannot be read from it.
How to find your own MAC address
- Windows: run
ipconfig /alland read the Physical Address of your adapter, or rungetmac. - Mac: run
ifconfig en0 | grep etherin Terminal, or hold Option and click the Wi-Fi icon in the menu bar. - Linux: run
ip linkand read the value afterlink/ether. - iPhone and Android: open the details of the Wi-Fi network you are on. With a private address turned on, that is the address the network sees, not the hardware one.
Our guide to what a MAC address is explains how it differs from an IP address and why websites never see it.
Vendor data: IEEE MA-L, MA-M and MA-S registries, downloaded 2026-10-25 (58,867 assignments). Sources: IEEE guidelines for EUI, OUI and CID, Android MAC randomization behavior, Apple: private Wi-Fi addresses, RFC 4291 (modified EUI-64).
Frequently asked questions
How do I find the manufacturer of a MAC address?
Paste the address into the box above. The first six hexadecimal digits (the OUI) identify the company that IEEE assigned the block to, and the tool looks them up in the IEEE MA-L, MA-M and MA-S registries, including the smaller 28-bit and 36-bit blocks that many lookups miss.
Why does a MAC lookup say the address is randomized or locally administered?
The second hexadecimal digit of the address is 2, 6, A or E, which means the locally administered bit is set. Phones and computers use addresses like this as private Wi-Fi addresses: Android 10 and later randomize by default, and Apple devices use a different private address for each network. A randomized address does not belong to any manufacturer, so no vendor lookup can name one.
Can I look up many MAC addresses at once?
Yes. Paste a list, or the whole output of arp -a, ip neigh or your router's client list. The tool finds every MAC address in the text, in any common format, and shows the vendor of each one. You can copy the results as CSV.
Can a MAC address tell me where a device is?
No. A MAC address identifies a network interface, not a place, and it never leaves your local network, so websites cannot see it. A vendor lookup only tells you who made the network card or who registered the block.
Is this MAC address lookup private?
Yes. The vendor data is downloaded to your browser in small pieces and the lookup runs there. The addresses you paste are not sent to our server.