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