A major Verizon outage appeared to impact customers across the United States starting around noon ET on Wednesday. Calls to Verizon customers from other carriers may also be impacted.

New York State Assembly member Anil Beephan called on the Federal Communications Commission to investigate the hourslong service outage.

Thousands of cell phone users reported a service outage on Wednesday morning, and the issue appears to be affecting a wide array of providers.

Verizon says it's working to restore service. But if your Verizon device still shows "SOS" instead of service bars, you're affected by today's outage.

In short, when you see SOS on your phone, it means you're not connected to a cellular network. "If you see SOS or 'SOS only' in the status bar, your device isn't connected to your cellular network, but you can still make emergency calls through other carrier networks," reads an Apple support page on the feature.

Verizon Wireless is experiencing a widespread outage Wednesday, prompting responses from emergency management teams in New York City and D.C.