41. It has the largest land area of any area code in the North American Numbering Plan . 42. North American Numbering Plan Administration site : http : / / www . nanpa . com 43. It is an N11 code of the North American Numbering Plan that are used for special services. 44. It is one of the original area codes established in 1947 for the North American Numbering Plan . 45. Even in closed numbering plans , it is not always necessary to dial all digits of a number. 46. The Numbering Plan as defined by the national regulator can be found in : Fundamental Numbering Plan . 47. Private numbering plans exist in telephone networks that are privately operated in an enterprise or organizational campus. 48. In Turkish numbering plan is in use. 49. The Numbering Plan as defined by the national regulator can be found in : Fundamental Numbering Plan. 50. Official information comes from www . nanpa . com, the site of the North American Numbering Plan Administration
