MAC Address Lookup
Find the vendor and manufacturer of a device using its MAC address.
Accepted formats: XX:XX:XX:XX:XX:XX, XX-XX-XX-XX-XX-XX or XXXXXXXXXXXX
Vendor Info:
What is a MAC Address?
A MAC address (Media Access Control) is a globally unique hardware identifier for network devices. It consists of 48 bits represented in hexadecimal — e.g. 20:37:06:12:34:56.
What is an OUI?
The first three bytes (24 bits) of a MAC address form the Organizationally Unique Identifier (OUI). It is assigned by the IEEE and uniquely identifies the device manufacturer worldwide.
How does the lookup work?
The tool sends the OUI of the entered MAC address to the macvendors.com API, which returns the corresponding manufacturer name. The lookup happens directly in your browser.
Frequently Asked Questions
Answers to common questions about MAC address lookup
A MAC address (Media Access Control Address) is a unique hardware identifier assigned to every network device. It consists of 48 bits (6 bytes) represented in hexadecimal, e.g. 20:37:06:12:34:56. The MAC address is embedded by the manufacturer and is used for identification at the data link layer (Layer 2) of the OSI model.
The first three bytes (OUI) of a MAC address identify the device manufacturer. This is useful for network analysis, troubleshooting, or identifying unknown devices on your home network. You cannot determine the exact user or location of a device from a MAC address alone.
The tool accepts all common MAC formats: colon-separated (20:37:06:12:34:56), dash-separated (20-37-06-12-34-56), and without separators (203706123456). The input is automatically normalized.
OUI stands for Organizationally Unique Identifier. It refers to the first 24 bits (3 bytes) of a MAC address, assigned by the IEEE and uniquely mapped to a manufacturer worldwide. The OUI is used to identify the device manufacturer.
Not all OUIs are registered in the public database. Some manufacturers use locally administered MAC addresses, or the OUI simply hasn't been added to the macvendors.com database yet. Randomly generated MAC addresses (e.g. used by modern operating systems for Wi-Fi scans) will also not be found.