The North American Numbering Plan (NANP) is a telephone numbering system that was established in 1947. It covers the United States, Canada, and several Caribbean nations, providing a standardized format for phone numbers. Each number consists of a three-digit area code followed by a seven-digit local number, ensuring efficient call routing and management. NANP helps streamline communication across regions by allowing for easy dialing and recognition of phone numbers. The system is crucial for telecommunications, enabling users to connect with others without confusion over different numbering formats. It also supports the growth of telecommunication services in the North America region.