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'''NANP''' stands for '''North American Numbering Plan'''. It is a telephone numbering plan designed and used commonly by 19 different countries and territories in North America. These countries include the United States and its territories, Canada, Bermuda, Anguilla, Antigua & Barbuda, the Bahamas, Barbados, the British Virgin Islands, the Cayman Islands, Dominica, the Dominican Republic, Grenada, Jamaica, Montserrat, St. Kitts and Nevis, St. Lucia, St. Vincent and the Grenadines, Trinidad and Tobago, and Turks & Caicos. NANP aims to reduce the complexity of dialing long distance international calls, making the direct dialing of long distance calls easy within the NANP network. NANP developed a three digit code area code and a seven digit local telephone number system. Through this system, calls can be directly switched to the particular area of the NANP Public Switched Telephone Network (PSTN), from where they can be further transferred to the designation using the local networks.<ref>[http://www.nanpa.com/about_us/abt_nanp.html nanp.com]</ref><ref>[http://www.networkworld.com/details/644.html networkworld.com]</ref>

'''NANP''' stands for '''North American Numbering Plan'''. It is a telephone numbering plan designed and used commonly by 19 different countries and territories in North America. These countries include the United States and its territories, Anguilla, Antigua & Barbuda, Bermuda,  the Bahamas, Barbados, the British Virgin Islands, Canada, the Cayman Islands, Dominica, the Dominican Republic, Grenada, Jamaica, Montserrat, St. Kitts and Nevis, St. Vincent and the Grenadines, St. Lucia, Turks & Caicos and Trinidad and Tobago. NANP aims to reduce the complexity of dialing long distance international calls, making the direct dialing easy for long distance calls within the NANP network. NANP developed a three digit code area code and a seven digit local telephone number system. Through this system, calls can be directly switched to the particular area of the NANP Public Switched Telephone Network (PSTN), from where they can be further transferred to the designation using the local networks.<ref>[http://www.nanpa.com/about_us/abt_nanp.html nanp.com]</ref><ref>[http://www.networkworld.com/details/644.html networkworld.com]</ref>

==History==

==History==

The American Telephone & Telegraph Corporation ([[AT&T]]), originally known as Bell System, developed the North American Numbering Plan in the early 1950s to assist the direct dialing of calls. On November 10, 1951, the first long distance directly dialed call was made from Englewood, New Jersey to Alameda, California. Before this day, dialing codes were used only by long distance operators, as the system did not facilitate direct calling. By the mid-1960's, almost all major North American countries and territories had the Plan executed successfully. Initially 86 codes were used to represent the different areas; these codes were allotted to different regions of North America according to the density of the population. The regions with high density population were allotted the lower numbers while the regions with low population were allotted the higher numbers. Thus, New York was allotted 212, Los Angeles 213, Chicago 312, Dallas 214, Detroit 313, and Pittsburgh 412, while South Dakota was given 605, North Carolina 704, South Carolina 803, and the Maritime Provinces of Canada 902.<ref>[http://www.area-codes.com/area-code-history.asp area-codes.com]</ref><ref>[http://www.lincmad.com/map1947.html lincmad.com]</ref><ref>[http://www.squidoo.com/area_codes squidoo.com]</ref>

The American Telephone & Telegraph Corporation ([[AT&T]]), originally known as Bell System, developed the North American Numbering Plan in the early 1950s to assist the direct dialing of calls. On November 10, 1951, the first long distance directly dialed call was made from Englewood, New Jersey to Alameda, California. Before this day, dialing codes were used only by long distance operators, as the system did not facilitate direct calling. By the mid-1960's, almost all major North American countries and territories had the Plan executed successfully. Initially 86 codes were used to represent the different areas; these codes were allotted to different regions of North America according to the density of the population. The regions with high density population were allotted the lower numbers while the regions with low population were allotted the higher numbers. Thus, New York was allotted 212, Los Angeles 213, Chicago 312, Dallas 214, Detroit 313, and Pittsburgh 412, while South Dakota was given 605, North Carolina 704, South Carolina 803, and the Maritime Provinces of Canada 902.<ref>[http://www.area-codes.com/area-code-history.asp area-codes.com]</ref><ref>[http://www.lincmad.com/map1947.html lincmad.com]</ref><ref>[http://www.squidoo.com/area_codes squidoo.com]</ref>