CENTURY 21 AAIM Real Estate is a real estate firm that serves Knox, Loudon, Anderson, Blount, Roane and Monroe counties in Tennessee. The company deals in the buying and selling of a range of residential properties and commercial buildings. With a presence in Knoxville, Tenn., it offers various mortgage lending assistance and relocation support services. CENTURY 21 AAIM Real Estate is a member of the Knoxville Board of Realtors. The company is a part of Century 21 Real Estate, which is the franchisor of one of the world s largest residential real estate sales organizations. The parent company provides training, management, administrative and marketing support services. It comprises more than 8,300 independently owned and operated franchised broker offices in over 50 countries and territories worldwide. Century 21 Real Estate is a subsidiary of Realogy Corporation, which is a global provider of real estate and relocation services.