United States: AT&T, Verizon, BellSouth, and Qwest, the four largest phone companies in the U.S., dominate the U.S. yellow pages industry; however, the term "yellow pages" and the Walking Fingers logo was heavily marketed by AT&T pre divestiture, AT&T never filed a trademark registration application for the current and most recognized version of the Walking Fingers logo, so it is in the public domain. AT&T allowed the "independent yellow pages" industry to use the logo freely.[1] The "independents" are unrelated to the incumbent phone company and are either pure advertising operations with no phone infrastructure or telephone companies who provide local telephone service elsewhere.