Comcast's customer service telephone number is 1-800-934-6489. This is the initial contact number for all departments, and collections calls are routed to the appropriate department after the call is connected. Comcast does not release a customer-facing direct number for its Collections department.
Comcast customer service can be reached via online chat or at a physical service location as well. Comcast also runs a customer support forum where customers can discuss phone-related issues and obtain self-service tools for many account functions. Through Comcast's self-service tools, customers can return equipment, view or pay a bill, set up or upgrade service and troubleshoot common issues prior to calling technical support.