August 4, 2015 6:06 PM EDT

Several major wireless carriers experienced outages across Tennessee, Kentucky and other southern states on Tuesday afternoon.

Customers began experiencing connectivity issues in cities including Nashville, Tenn., Louisville, Ky., and Huntsville, Ala., around 3:00 p.m. Central Time, according to outage maps from AT&T, Verizon, T-Mobile and Sprint. According to a statement from Sprint, the issue was caused by a local exchange provider.

All four companies are investigating the issue, which appears to be affecting customers regardless of their carrier, T-Mobile’s customer service team said on Twitter.

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