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With the rollout of the North American Numbering Plan, direct-dial coast-to-coast telephone service begins in the United States.
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North American Numbering Plan
Integrated telephone numbering plan of twenty North American countries
The North American Numbering Plan (NANP) is an integrated telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Numbering Zone 1 and has the country code 1. Some North…Source: Wikipedia (CC BY-SA)
Telephone
Telecommunications device
A telephone, commonly shortened to phone, is a telecommunications device that enables two or more users to conduct a conversation when they are too far apart to be easily heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic…Source: Wikipedia (CC BY-SA)