Dex One Corporation, formerly R.H. Donnelley Corporation (RHD), is a marketing services company that helps local businesses to reach consumers. It offers local businesses personalized marketing consulting services and exposure across a network of local marketing products, including its print, online and mobile yellow pages and search solutions, as well as search engines. Through its Dex Advantage, clients' business information is published and marketed through a single profile and distributed via a variety of both owned and operated products, and through other local search products. On May 28, 2009, RHD and its subsidiaries filed voluntary petitions for Chapter 11 relief under the Bankruptcy Code in the United States Bankruptcy Court for the District of Delaware. RHD emerged from Chapter 11 relief under Title 11 of the United States Code on January 29, 2010 (Effective Date). On the Effective Date and in connection with its emergence from Chapter 11, RHD was renamed Dex One Corporation.