linguistic:voice_change
History

The 411 number has been used since at least 1930 in New York City, San Francisco, and other large cities where panel and crossbar switching equipment installed by the Bell System was prevalent. However, in smaller Bell System cities as well as almost all areas served by GTE and other companies where step-by-step equipment was the norm such as Los Angeles, 113 was used until at least the 1960s, and in some cases (the Pacific Northwest, for example) until the mid-1980s.