Arm Ltd MAC Addresses
This page provides information about MAC addresses and OUIs assigned to Arm Ltd. The Organizationally Unique Identifier (OUI) is the first 24 bits of a MAC address and is assigned by the IEEE to uniquely identify a vendor or manufacturer.
About Arm Ltd MAC Addresses
MAC addresses beginning with 84:67:9A: are manufactured by Arm Ltd. When you see a device on your network with this OUI prefix, it indicates that the device was manufactured by Arm Ltd.
The IEEE assigns OUI prefixes to manufacturers to ensure uniqueness in the global networking ecosystem. Arm Ltd has been assigned the OUI prefix 84679A (among others) for use in their network devices.
Common Arm Ltd Devices
Devices manufactured by Arm Ltd that you might encounter on networks include:
- Network interface cards (NICs)
- Routers and switches
- Wireless access points
- IoT devices
- Embedded systems
- And other networking equipment
Identifying Arm Ltd Devices on Your Network
To identify Arm Ltd devices on your network:
- Use network scanning tools to list devices on your network
- Look for MAC addresses starting with any of the OUI prefixes listed in the sidebar
- Use our MAC address lookup tool to confirm the manufacturer
This can be particularly helpful for network inventory, troubleshooting, and security auditing.
MAC Address Format
A complete MAC address consists of 48 bits (6 bytes) and is typically represented in hexadecimal format with each byte separated by a colon or a hyphen. For Arm Ltd devices, the MAC address would look like:
84:67:9A:XX:XX:XX
The first three bytes (84:67:9A) identify the manufacturer as Arm Ltd, while the last three bytes are unique to each device.