Public Address Format (little-endian format) It follows the same guidelines as MAC Addresses and shall be a 48-bit extended unique identifier (EUI-48). Public AddressĪ Bluetooth Public address is a global fixed address that must be registered with the IEEE. Random Address and Private Address, as shown in the diagram, are simply classifications and are not types used in and of themselves in implementation. To summarize, the four Bluetooth address types are: The above diagram shows the hierarchy of Bluetooth address types. Let’s take a look at a diagram that summarizes the different types of Bluetooth addresses available: Bluetooth Address Types Per the Bluetooth Core specification document, there are two main types of Bluetooth addresses: public and random addresses.Ī Bluetooth device must use one of these types of addresses, and in some cases, it contains both types. In the Bluetooth specification, it is referred to as BD_ADDR. Understanding how Bluetooth addresses work is crucial for every BLE developer, especially when device privacy is a concern.Ī Bluetooth address sometimes referred to as a Bluetooth MAC address, is a 48-bit value that uniquely identifies a Bluetooth device. Like a MAC address for LAN-connected devices, Bluetooth devices also have an identity address associated with each device.
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