AT&T customers are facing a service outage that began Tuesday and is impacting their ability to make calls to contacts on other carriers.

"There is a nationwide issue that is affecting the ability of customers to complete calls between carriers. The carriers are working as quickly as possible to diagnose and resolve the issue," an AT&T spokesperson told FOX Business in a statement.

"Nationwide 9-1-1 Services are operating normally at this time and our customers are not affected. We're working to correct a wireless impact notification that was sent in error to 9-1-1 call centers," the statement continued.

The company believes that calls between AT&T customers haven't been impacted by the outage.

Several law enforcement and emergency response centers from localities around the country posted on X, formerly Twitter, that they received communications from AT&T indicating that its customers may not be able to call 9-1-1 and provided alternative phone numbers to contact until service is restored.

According to AT&T's statement, that wireless impact notification was sent erroneously and calls to 9-1-1 emergency lines shouldn't be impacted by the ongoing outage.

The Federal Communications Commission (FCC) said in a post on X that, "We're aware of reports that consumers in multiple states are unable to make wireless calls and we are currently investigating."

This is a developing story. Please check back for updates.