Random MAC Address Generator

This program generates multiple random MAC addresses. You can also look up a MAC address on this page.

Your 10 MAC addresses

What is a MAC address? What is OUI?

A MAC address is a unique identifier for network interfaces. It is a 48-bit number (12 hexadecimal characters). They can either be written in either of these formats:

MM:MM:MM:SS:SS:SS
MM-MM-MM-SS-SS-SS

An OUI {Organizationally Unique Identifier} is a 24-bit number that uniquely identifies a vendor or manufacturer. They are purchased and assigned by the IEEE. The OUI is basically the first three octets of a MAC address. For example, these are examples of OUI:

00:00:0A -- this is owned by Omron
00-0D-4B -- this is owned by Roku, LLC

How to find the MAC address

How to find the MAC address in Windows

Go to the DOS prompt
- Click on Start button, select Run
- Type cmd and press ENTER
In the DOS prompt, type ipconfig /all and press ENTER
You should see the MAC address in this format 00:00:00:00:00:00

How to find the MAC address in Unix or Linux

Go to a terminal
In the terminal, type ifconfig and press ENTER
You should see the MAC address in this format 00:00:00:00:00:00 following HWaddr

How to find the MAC address in Mac OS

Go to Utilities (Finder > Utilities OR command + shift + u) and start the Terminal app.
Type this in the Terminal:
```
networksetup -listallhardwareports
```

You will see a list of all the network interfaces with their MAC addresses (Ethernet Address). An example output is this:

networksetup -listallhardwareports

Hardware Port: Bluetooth DUN
    Device: Bluetooth-Modem
Ethernet Address: N/A

Hardware Port: Ethernet
    Device: en0
Ethernet Address: 10:dd:b1:xx:xx:xx

Hardware Port: FireWire
    Device: fw0
Ethernet Address: 10:dd:b1:ff:fe:xx:xx:xx

Hardware Port: Wi-Fi
    Device: en1
Ethernet Address: 4c:8d:79:xx:xx:xx

Hardware Port: Bluetooth PAN
    Device: en3
Ethernet Address: N/A

VLAN Configurations
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