MAC Address Generator - Free Online IT Tool

💻 MAC Address Generator

Generate randomized MAC addresses with optional vendor OUI prefixes.

How many to generate?

Vendor Prefix (OUI)

Uppercase

ℹ️ About MAC Address Generator

The MAC Address Generator creates randomized 48-bit hardware identifiers, also known as Physical Addresses. In network engineering and software testing, you often need "dummy" MAC addresses to test ARP handling, DHCP assignments, or inventory management systems without using real hardware IDs.

This tool allows you to generate standard random addresses or specify an **Organizationally Unique Identifier (OUI)** prefix. By using a specific OUI, you can make the generated addresses appear as though they belong to a particular manufacturer, such as VMware, Apple, or Raspberry Pi. This is particularly useful for lab environments and simulations.

📖 How to use MAC Address Generator

1. Select how many MAC addresses you need (up to 100).
2. Optional: Choose a vendor prefix from the dropdown menu.
3. Choose your preferred casing (Uppercase is standard for documentation).
4. Click 'Run Tool' to generate the list.

❓ Frequently Asked Questions

What is an OUI?

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

Can I use these addresses on a real network?

Yes, but you must ensure they don't conflict with any existing devices on your local segment. MAC addresses must be unique within a single Layer 2 domain.

What is MAC Address Spoofing?

It is the practice of changing the MAC address of a physical network interface to a different value, often using a generated address like the ones created by this tool.