As of 2015, the major credit bureaus do not have any fax numbers listed, but can be reached by phone or mail, notes About.com. Equifax can be contacted by phone at (800) 685-1111 for general credit report information and (866) 349-5191 to dispute credit report information, notes the official website.
TransUnion can be reached at (800) 888-4213, states Experian. The agency can be called at (800) 916-8800 for credit disputes and (800) 680-7289 to report identify theft, says TransUnion. Many of these options are available online for registered members. Users receive an annual credit report with Experian by dialing (877) 322-8228, says About.com. For fraud detection, customers call (888) 397-3742.