Fingerbank is a service that determines what type of device is connected to a network. It does this by exposing the device's MAC unique identifier address and analyzing the order of DHCP commands to determine device and operating system. This type of information can be utilized by Network Access Control administrators who want to target content to specialized devices, ignore features to certain devices, or use this data for web visitor analytics. Visitors to the site may either query the fingerprint database, download the database as an SQL database, or implement the Fingerbank API to make calls directly from applications. Users may register for API access with Fingerbank through their GitHub accounts.