A nationwide AT&T outage is once again leaving customers in the dark on Tuesday. In a statement sent to CNN, the company said a problem is preventing AT&T customers from completing calls between carriers. Calls between AT&T customers aren’t impacted.

AT&T on Tuesday said the telecommunications company and other wireless carriers are working to fix an issue preventing customers from completing calls placed to non-AT&T customers across the U.S."There is a nationwide issue that is affecting the ability of customers to complete calls between carriers.

AT&T said the problem affected people trying to call customers of different carriers, but 911 and other emergency calls were not affected.

The FCC looks into a telecoms outage where AT&T users were suddenly unable to make calls to carriers like Verizon on Tuesday. AT&T says it's since resolved the issue.

AT&T said late on Tuesday that an issue that had prevented making some calls to other wireless carriers had been resolved. Earlier, AT&T, Verizon and T-Mobile said they were all experiencing issues with some calls between carriers.

Customers of AT&T and Verizon faced problems when calling between carriers, the companies said, according to multiple reports. “The interoperability issue between carriers has been resolved,” an AT&T spokesperson said in an emailed statement to The Hill Tuesday.

AT&T has resolved a “nationwide issue” that had been affecting calls between carriers on Tuesday, the company said.

"The interoperability issue between carriers has been resolved," said an AT&T spokesperson. "We collaborated with the other carrier to find a solution and appreciate our customers patience during this period.

Problems began for AT&T and Verizon customers around noon CT and climbed throughout the afternoon before peaking around 4:15 p.m. CT, according to user reports on DownDetector. Later in the evening, AT&T posted a statement on X,