Organizationally Unique Identifier (OUI) is the first 24 bits of a MAC address that indicates the specific vendor or manufacturer.

How do I find my MAC address?

On Windows: Type "ipconfig /all" in cmd. On Mac/Linux: Type "ifconfig" in terminal. It is listed as "Physical Address" or "ether".

Are MAC addresses unique?

Yes, every network interface card (NIC) has a unique MAC address assigned by the manufacturer.

Can a MAC address be faked?

Yes, "MAC spoofing" is possible in software, so do not rely solely on MAC addresses for high security.

Why does it say "Unknown Vendor"?

The database contains all registered OUIs. If a vendor uses a private range or is very new, it might not be listed yet.

MAC Address Lookup

MAC Address Lookup Overview

Identify device manufacturer from MAC OUI

MAC Address Lookup is a network diagnostic tool that identifies the manufacturer or vendor of a network device by analyzing its MAC (Media Access Control) address OUI (Organizationally Unique Identifier). Every network interface card (NIC) in computers, smartphones, routers, IoT devices, and network equipment has a unique MAC address assigned by the manufacturer. The first 24 bits (first 6 hexadecimal digits) of a MAC address form the OUI, which identifies the specific vendor who produced the device. This lookup tool queries a comprehensive database of registered OUIs maintained by the IEEE (Institute of Electrical and Electronics Engineers) to match MAC addresses to manufacturers. MAC address lookup is essential for network security (identifying unknown devices on your WiFi), network troubleshooting (determining device types causing issues), inventory management (cataloging network equipment), and forensic analysis (tracking device origins). The tool supports all common MAC address formats including colon-separated (00:1A:2B:3C:4D:5E), dash-separated (00-1A-2B-3C-4D-5E), and no-separator formats (001A2B3C4D5E). This MAC checker is invaluable for network administrators securing WiFi networks, IT professionals troubleshooting connectivity, security analysts investigating incidents, and anyone needing to identify unknown devices on their network.

How to Use MAC Address Lookup

Enter the MAC address (e.g., 00:1A:2B:3C:4D:5E)
Click "Search" to identify the vendor
See the manufacturer name associated with the OUI
Use vendor information for network security or troubleshooting
Try different MAC address formats if needed

Frequently Asked Questions

What is an OUI?: Organizationally Unique Identifier (OUI) is the first 24 bits of a MAC address that indicates the specific vendor or manufacturer.
How do I find my MAC address?: On Windows: Type "ipconfig /all" in cmd. On Mac/Linux: Type "ifconfig" in terminal. It is listed as "Physical Address" or "ether".
Are MAC addresses unique?: Yes, every network interface card (NIC) has a unique MAC address assigned by the manufacturer.
Can a MAC address be faked?: Yes, "MAC spoofing" is possible in software, so do not rely solely on MAC addresses for high security.
Why does it say "Unknown Vendor"?: The database contains all registered OUIs. If a vendor uses a private range or is very new, it might not be listed yet.

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