MAC address vendor lookup
MAC address vendor lookup
Use this MAC address lookup to normalize an address and find the OUI vendor with a public keyless API.
What is a MAC vendor lookup (OUI lookup)?
A MAC vendor lookup, also called an OUI lookup, identifies the manufacturer of a network device from the first 24 bits of its MAC address. Those first three bytes are the Organizationally Unique Identifier (OUI) that the IEEE assigns to each vendor, so 00:1B:63 maps to Apple. The remaining 24 bits are set by the manufacturer and are not part of the vendor lookup.
| OUI prefix | Registered vendor |
|---|---|
| 00:1B:63 | Apple, Inc. |
| FC:FB:FB | Cisco Systems, Inc. |
| 00:00:F0 | Samsung Electronics Co., Ltd. |
| 00:02:B3 | Intel Corporation |
| 00:03:FF | Microsoft Corporation |
| 00:0C:29 | VMware, Inc. |
| B8:27:EB | Raspberry Pi Foundation |
Have an IP instead of a MAC? Try the WHOIS lookup for domain and IP ownership, or IP geolocation to find the network and location behind an address.
Network tool FAQ
How do I look up the vendor of a MAC address?
Paste the full MAC address or just the first six hex characters (the OUI prefix) into the tool and run the lookup. It matches the OUI against the IEEE-registered vendor list and returns the manufacturer name.
What is an OUI prefix?
An OUI is the first six hexadecimal characters of a MAC address assigned to an organization.
Is MAC vendor lookup the same as OUI lookup?
Yes. Both names describe the same process: identifying the device manufacturer from the Organizationally Unique Identifier (OUI), which is the first 24 bits of the MAC address.
Can this identify the exact device?
No. It identifies the registered prefix owner, not the exact device model or current owner.
Why is a vendor missing?
The prefix may be private, randomized, newly assigned, or absent from the public vendor list used by the tool.
Do randomized MAC addresses work?
Randomized addresses often do not map to the real device vendor and may not return a useful match.
What formats can I paste?
Colon, hyphen, dot, or plain hexadecimal formats work as long as the first six hex characters are present.