A computer-implemented method and system for a graphical network connection timeline is provided. The method comprises receiving network connection data for a client device and storing the data in a first data repository. Using the data stored in the first data repository, one or more connection time period values for the client device is calculated. Each of the connection time period values represent a time of wireless network connection of the client device to each of one or more access points. The method further comprises generating a network connection timeline that tracks a network connectivity of the client device and storing the timeline in a second data repository. The timeline comprises a frequency band indicator, a time period, and one or more markers based, at least in part, on each of the connection time period values. The network connection timeline stored in the second data repository is then displayed in a Graphical User Interface (GUI).