An unspecified problem is causing service issues for AT&T wireless and fixed-line customers in parts of the southeastern United States and appears to be affecting other carriers as well.
“We are investigating the cause and working as quickly as possible to restore service,” AT&T said in a statement.
According to the site Downdetector.com, the issues are most pronounced in Kentucky and Tennessee and are impacting customers of AT&T, Verizon, Sprint and T-Mobile.
Update, 2:55 pm PT: A Sprint representative said that a local provider appears to be behind the outages.
“We are aware of the impacts to service in which customers across multiple carriers may be unable to access voice and some data services,” the Sprint representative said. “This appears to be an issue caused by a local exchange provider and our network team is working with the provider to restore service to impacted customers as quickly as possible.”
A Verizon representative said the company is working with an unnamed vendor on “a connectivity issue” affecting service in parts of Tennessee, Alabama, Kentucky and Indiana.
“Our engineers are aware of this issue and are working with our vendor partners to resolve this issue quickly,” the Verizon representative said. “At present we do not have an estimated time of resolution.”
This article originally appeared on Recode.net.