Despite a Downdetector map showing mass service interruptions beginning Monday morning and lasting throughout the afternoon, Zoom said all of its systems were fully operational.

A Zoom spokesperson confirmed that "all of our systems are and have been fully operational.”

Outages were reported by Downdetector from coast to coast: Boston, New York, Washington, D.C., Atlanta and Tampa in the East and South; Dallas, Houston, Minneapolis and St. Louis in the Midwest, Southwest and Great Lakes; and Phoenix, Los Angeles, San Francisco and Seattle in the Southwest and West.

The problems began about 8:10 a.m., with outages being reported on the East and West coasts, as well as in the United Kingdom and around the Baltic Sea nations.

By 9 a.m., many of the outages, according to DownDetector’s map, seemed to have been cleared up along the West Coast. But at 11 a.m., the map was showing Zoom outages popping back up on the West Coast and spreading across the Midwest and Great Lakes.

Problems being reported on Downdetector included server connection and conference-joining issues, as well as video quality.

Three weeks ago, on Aug. 24, Zoom experienced another massive outage for thousands of users across the globe. Educators, parents and students were most challenged by the system glitches, with thousands starting virtual school via the platform that day.

Grade schools, high schools and universities are relying on Zoom and competing technologies such as Microsoft Teams for virtual lessons to reduce the chance of infection during the pandemic.

Zoom Video Communications became a familiar tool to millions of new users after the spread of COVID-19 made face-to-face meetings risky.

Zoom went public in April 2019.