U.S. phone giant AT&T confirmed Friday it will begin notifying millions of consumers about a fresh data breach that allowed cybercriminals to steal the phone records of “nearly all” of its customers, a company spokesperson told TechCrunch.

In a statement, AT&T said that the stolen data contains phone numbers of both cellular and landline customers, as well as AT&T records of calls and text messages — such as who contacted who by phone or text — during a six-month period between May 1, 2022 and October 31, 2022. 

AT&T said some of the stolen data includes more recent records from January 2, 2023 for a smaller but unspecified number of customers.

The stolen data also includes call records of customers with phone service from other cell carriers that rely on AT&T’s network, the company said. 

AT&T said the stolen data “does not contain the content of calls or texts,” but does include calling and texting records that an AT&T phone number interacted with during the six-month period, as well as the total count of a customer’s calls and texts, and call durations — information that is often referred to as metadata. The stolen data does not include the time or date of calls or texts, AT&T said.

Some of the stolen records include cell site identification numbers associated with phone calls and text messages, information that can be used to determine the approximate location of where a call was made or text message sent.

In all, the phone giant said it will notify around 110 million AT&T customers of the data breach, company spokesperson Andrea Huguely told TechCrunch. 

AT&T published a website with information for customers about the data incident. AT&T also disclosed the data breach in a filing with regulators before the market opened on Friday.