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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“The nonconformist and the rebel say all manner of unanswerable things against the existing republic, but discover to our sense no plan of house or state of their own.”
—Ralph Waldo Emerson (1803–1882)
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