Uptime testing reached 5 checks over the 1 529 days from November 27, 2020, for app.c21.com as per the data. According to the tests performed, app.c21.com was accessible a total of 5 times, with the most recent uptime on November 8, 2021, returning a code 200. As of February 4, 2025, all inspections conducted had found no instances of app.c21.com's non-functionality. Of all the replies received, as of February 4, 2025, any response was not indicated as having an error status. The recorded 1.234 seconds on November 8, 2021, contrasted app.c21.com's 1.261 seconds average response time.