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MAC Address OUI Lookup & Generator

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Lookup MAC hardware vendor (OUI), validate formats (colon, hyphen, dot), and generate random valid unicast or multicast MAC addresses.

MAC Address Input

Enter MAC Address

Valid 48-bit MAC Address

Hardware Vendor / OUI

Raspberry Pi Foundation

OUI Prefix: B8:27:EB

Transmission: Unicast | Administration: Globally Unique

Formatted Notations

Standard Colon Notation:

Hyphen Notation (Windows):

Cisco Dot Notation:

Raw Hexadecimal:

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DevOps & System Utility Pipeline

Direct In-Browser Handoff

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Helpful Examples

Cisco MAC format

Format 00:1A:2B:3C:4D:5E to Cisco dot notation

001a.2b3c.4d5e

How to Use the MAC Address OUI Lookup & Generator

Client-side MAC address utility. Lookup hardware manufacturer OUI prefixes from common vendors, convert seamlessly between standard colon, hyphen, Cisco dot, and raw hex formats, and generate random unicast or multicast MAC addresses with locally/universally administered bit flags.

Privacy & Data Processing Notice

No user data leaves your browser. Computation is executed entirely on your device. We do not store, view, or transmit your inputs over our network. Your computation remains on your personal machine.

Frequently Asked Questions

What is an OUI in a MAC address?

An OUI (Organizationally Unique Identifier) is the first 24 bits (3 octets) of a MAC address assigned to hardware manufacturers by the IEEE.

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