If you're here looking up AT&T Business customer care, you probably already know who they are. But it helps to get an idea of how big they are and what their support operation looks like if you are a customer. AT&T Business also goes by or is associated with the names AT&T, A T and T, AT and T. They are considered to be part of the following sectors and industries: telecommunicationsmass, media. AT&T Business is associated with terms like satellite television, fixed line telephone, mobile phone, broadband, digital television, home security, public by their customers and industry analysts. They employ 121 people according to customers in the know.