CHARLOTTE, N.C. — US LEC’s customer base has surged past 28,000, the telecommunications provider said Monday.

US LEC (Nasdaq: CLEC) provides telecom and data services across the South and Mid-Atlantic states.

As of July 31, the company reported having 28,049 customers. That’s an increase of 13 percent over one year, US LEC said.

Of those customers, more than 21,000 now use data services.

US LEC added that its customer retention rate is 99 percent.