What is a MAC address?

A 48-bit hardware identifier assigned to network interfaces. Format: XX:XX:XX:XX:XX:XX or XX-XX-XX-XX-XX-XX in hexadecimal.

Organizationally Unique Identifier—the first 3 bytes of a MAC address. IEEE assigns OUIs to manufacturers for unique device identification.

Can MAC addresses be spoofed?

Yes, MAC addresses can be changed in software. This is legitimate for privacy but also used maliciously. Don't rely on MAC for security.

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MAC Address Lookup

Identify hardware vendor from MAC address

Enter MAC Address

Supported formats: XX:XX:XX:XX:XX:XX, XX-XX-XX-XX-XX-XX, or XXXXXXXXXXXX

Try a sample:

Search Vendors

Database contains 205 OUI entries from major vendors.

About MAC Address Lookup

What is MAC Address Lookup?

Enter a MAC address to identify the hardware manufacturer. The first 3 bytes (OUI) are registered to vendors, revealing if a device is from Apple, Intel, Cisco, etc.

Features & Benefits

Vendor identification
OUI database lookup
Multiple format support
Network troubleshooting
Device inventory help
Privacy-focused (local)

Frequently Asked Questions

What is a MAC address?: A 48-bit hardware identifier assigned to network interfaces. Format: XX:XX:XX:XX:XX:XX or XX-XX-XX-XX-XX-XX in hexadecimal.
What is an OUI?: Organizationally Unique Identifier—the first 3 bytes of a MAC address. IEEE assigns OUIs to manufacturers for unique device identification.
Can MAC addresses be spoofed?: Yes, MAC addresses can be changed in software. This is legitimate for privacy but also used maliciously. Don't rely on MAC for security.

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