Dallas—Idearc, which owns ad platforms including Superpages.com, Switchboard.com, Yellow Pages and Verizon White Pages, Tuesday announced that Chairman John J. “Jack” Mueller has added the title of CEO, effective immediately. Mueller succeeds Kathy Harless, who was president-CEO and has left the company. A company spokeswoman said Harless would remain on the board until the annual meeting in May. Mueller was previously a business consultant and interim CEO of Connexion Technologies, a fiber-optic network company.