In telephony, especially in North America, an overlay plan is the practice of introducing a new area code by applying it onto a geographic area that is already occupied by one or more existing area codes, resulting in two (or more) area codes serving the same area.
Read more about Overlay Plan: Methodology, Types of Overlays, Number Pool Management
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“To choose one’s victims, to prepare one’s plan minutely, to slake an implacable vengeance, and then to go to bed ... there is nothing sweeter in the world.”
—Josef Stalin (1879–1953)
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