About Serial Numbers and MAC Addresses

Vocera uniquely identifies devices by the MAC Address field as an alphanumeric value.

The Vocera system can derive the MAC address from the serial number, also an alphanumeric value. When you add or update a device and enter the serial number for a Vocera device, the MAC Address field is populated automatically. The length of serial numbers varies per device type. The following table lists Vocera devices with the serial number length for each device:

Device Type

Serial Number Length

V5000 Smartbadge








Cisco Unified Wireless IP Phone 7921G, 7925G, and 7926G


Most MAC addresses for Vocera devices have the following 6-character prefix: 0009ef where the last 6 characters of the MAC address are identical to the last 6 characters of the serial number. Vocera Smartphones have a different MAC address range than the Vocera devices.

When you add or update a Vocera device, Vocera checks for consistency of the serial number with the MAC address. The last 6 characters of the serial number must match the last 6 characters of the MAC address. If you provide a Vocera device serial number without a MAC address, the system automatically fills in the value, whether you are using the Web Console to add or update the device or are importing the data from a CSV file.