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In NANP telephone number specifications, the letter N represents a numeral from 2 through 9, while the letter X represents any numeral. Thus, NXX is a number from 200 through 999, while XXXX is a range from 0000 through 9999. The first three digits of a telephone number are the numbering plan area code (NPA code, or simply NPA).
Open competition also brought an end to the pattern of long distance subsidizing local service, bringing per-minute charges down to levels where any business could afford to take orders using an 800-number. Originally, 800 service in the US and 800 service in Canada were isolated from each other, but in 1984, an agreement between carriers in ...
A broad division is commonly recognized between closed and open numbering plans. A closed numbering plan, as found in North America, features fixed-length area codes and local numbers, while an open numbering plan has a variance in the length of the area code, local number, or both of a telephone number assigned to a subscriber line. The latter ...
The number blocks of failed service providers often remained unused, as no regulatory mechanism existed to reclaim and reassign these numbers. Area codes are added by two principal methods, number plan area splits and overlays. Splits were implemented by dividing an area into two or more regions, one of which retained the existing area code and ...
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The Opta is the governing body that regulates premium rate services in the Netherlands. Starting June 2014 any 0900 number used for customer service purposes is regulated so that it is free to the caller, for if they buy the product, they also buy the right to contact consumer service. [6]
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