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In North America, permissive dialing is the ability to make phone calls in an area subject to a newly introduced area code by using both the new and preexisting dialing methods. [ 1 ] When an area is given a new area code under a split plan , the area's previous area code would no longer be valid for calls in the area, so calls to numbers using ...
Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.
A 9 would be inserted as the new second digit of all area codes (e.g. 212 would become 2912, 916 would become 9916). Permissive dialing would be allowed because exchange equipment, on detecting a 9 as the second digit of the area code, would respond appropriately to expect 11 digits, or 10 in the absence of a 9 in that position.
The telecommunication services of Mexico are provided by a division of the telephone numbering plan into groups of area codes for the ... 668, 669, 672, 673, 687, 694 ...
To find out the 25 poorest and richest area codes, GOBankingRates used the 2015 Census Community Survey, the most recent data available, to rank cities across the nation in order of mean household ...
In California and New York, because of the existence of both overlay area codes (where an area code must be dialed for every call) and non-overlay area codes (where an area code is dialed only for calls outside the subscriber's home area code), "permissive home area code dialing" of 1 + the area code within the same area code, even if no area ...
Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, or 888. Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special dialing code in the group NXX for various other purposes.
Area code 408 was split from numbering plan area 415 in a flash-cut (without permissive dialing period) on March 1, 1959. The new numbering plan area included most of Santa Clara , Santa Cruz , Monterey and San Benito Counties.