Several phone service providers, including AT&T, were down for many users across the United States early Thursday, according to Downdetector.com, which tracks telecommunication and internet disruptions.
The outage, which affected users in cities including Atlanta, Los Angeles and Dallas, was first reported around 3:30 a.m. Eastern time, and problems were still being widely reported five hours later.
AT&T said in a statement on Thursday that some of its customers were experiencing wireless service interruptions. “We are working urgently to restore service to them,” the statement said, without giving an estimate of when service would be back. “We encourage the use of Wi-Fi calling until service is restored.”
The company said on its website that there were also wireless outages in San Diego, Richmond and Miami, with the initial cause listed as “maintenance activity.”
Around 8 a.m., about 60,000 people were reporting to Downdetector that they were experiencing problems with AT&T. Verizon and T-Mobile were seeing much smaller numbers of reports, at more than 3,500 and 1,500, respectively.
Verizon and T-Mobile said in statements that their networks were operating normally.
“Some customers experienced issues this morning when calling or texting with customers served by another carrier,” Verizon said. “We are continuing to monitor the situation.”
In an email, T-Mobile said: “We did not experience an outage. Our network is operating normally. Downdetector is likely reflecting challenges our customers were having attempting to connect to users on other networks.”
The San Francisco Fire Department said on social media that it was aware of an issue impacting AT&T users who were trying to call 911. “We are actively engaged and monitoring this,” the fire department said. “If you are an AT&T customer and cannot get through to 911, then please try calling from a landline.”
This is a developing story.
Victor Mather contributed reporting.
