Xfinity Outage Knocks Out Bay Area Internet Service for Thousands Monday Morning

Screens went dark and video calls dropped across San Francisco, Oakland, Marin County, Napa and beyond Monday morning when a widespread Xfinity outage cut internet service for thousands of Bay Area customers at the start of the workweek.

Reports surged shortly after 9 a.m. on March 16, peaking at more than 7,000 user complaints on outage-tracking sites including Downdetector. The disruption hit residential and business subscribers alike across San Francisco, the East Bay, North Bay, Peninsula, South Bay and San Jose, KRON4 noted the spike in reports after 9 a.m. with no immediate explanation from Comcast, Xfinity's parent company.

The outage proved short-lived for most. The San Francisco Chronicle reported that brief outages hit customers across the region, with most issues appearing to resolve by 10 a.m., roughly an hour after complaints began flooding in. By Tuesday, March 17, Downdetector's 24-hour map showed a resolved concentration across the Bay Area and no new surge had emerged.

Comcast acknowledged the issue and said it was working to restore service as quickly as possible, but provided no technical explanation for what caused the failure. As of Tuesday, the company had not issued a formal follow-up statement detailing the full scope of the outage or any preventive measures planned.

Customers who experienced service interruptions were advised to check the official Xfinity outage map by entering their full service address for personalized status updates, text "Out" to 266278, or use the Xfinity app when accessible. While restarting modems and routers is a standard troubleshooting step, during widespread outages those measures typically prove ineffective until Comcast restores service on its end.

The outage underscored the Bay Area's exposure to connectivity failures at a particularly high-stakes moment: the start of a Monday workweek in a region where Xfinity is one of the dominant broadband providers serving both remote workers and local school communities. Comcast has yet to explain what knocked out service or what it plans to do to prevent a repeat.