The Registration Authority
IEEE offers Registration Authority programs or registries which maintain lists of unique identifiers under standards and issue unique identifiers to those wishing to register them. The IEEE Registration Authority assigns unambiguous names to objects in a way which makes the assignment available to interested parties.
FINDING THE RIGHT MAC ADDRESS FOR YOUR BUSINESS

In the burgeoning Internet of Things (IoT) age, billions of devices will need to communicate with one another. To do this, Media Access Control (MAC) addresses are often needed by technology manufactures implementing IEEE 802® networking standards, most notably IEEE 802.3® (Ethernet) and IEEE 802.11™ (Wi-Fi®).

The IEEE Registration Authority makes MAC addresses available in Small, Medium, and Large blocks.

But how do I know what size MAC address block is right for my company?

Check out the infographic to determine the right size MAC address for your business.

MAC Address Block Large (MA-L)
An MA-L assignment includes an OUI and large blocks of EUI-48 and EUI-64 values which can be used as MAC Addresses, Bluetooth Device Addresses, Ethernet Addresses or object identifiers.
MAC Address Block Large (MA-L)
MAC Address Block Medium (MA-M)
An MA-M assignment includes medium blocks of EUI-48 and EUI-64 values which can be used as MAC Addresses, Bluetooth Device Addresses, Ethernet Addresses or object identifiers.
MAC Address Block Medium (MA-M)
MAC Address Block Small (MA-S)
An MA-S assignment includes an OUI-36 and small blocks of EUI-48 and EUI-64 values which can be used as MAC Addresses, Bluetooth Device Addresses, Ethernet Addresses or object identifiers.
MAC Address Block Small (MA-S)