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Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
Area code 603 in a 1956 map, covering the whole state.. Area code 603 is the sole area code for the U.S. state of New Hampshire in the North American Numbering Plan (NANP). It was created as one of the original 86 numbering plan areas in October 1947.
Claro Puerto Rico, which serves every exchange in Puerto Rico, has been owned by the international telecommunications giant América Móvil since in 2007. Ziply Fiber, which serves ex-GTE areas in the Pacific Northwest that they bought from Frontier. Many other individual communities or smaller regions are also served by non-RBOC companies.
Northern New England Telephone Operations, Inc. was created as a subsidiary of Verizon New England to operate exchanges that Verizon was preparing to sell to FairPoint Communications in Maine, New Hampshire, and Vermont.
A subscriber would call 950-XXXX to reach a specific carrier, then dial the long-distance destination number. This feature group 'B' has been rendered obsolete by 1010xxx "dial-around" feature group 'D', but the exchange remains reserved in each individual area code. 951
The three-digit number is unique to each individual county within a state, but to be unique within the entire United States, it must be prefixed by the state code. This means that, for example, while Belknap County, New Hampshire is 001, Addison County, Vermont and Alachua County, Florida are also 001. To uniquely identify Belknap County, New ...
Numbering plan areas and area codes since May 2001 September 1997 [1] – May 2001 [2] July 1988 [3] – September 1997 [4] [5] October 1947 – July 1988 [6]. Massachusetts is divided into five distinct numbering plan areas (NPAs), which are served by nine area codes in the North American Numbering Plan (NANP), [7] organized as four overlay complexes and a single-area code NPA.
The following is a list of New Hampshire state agencies—government agencies of the U.S. state of New Hampshire.Entries are listed alphabetically per their first distinguishing word (e.g. the New Hampshire Department of Agriculture, Markets, and Food is listed under "A" for Agriculture), with subordinate agencies listed under their parent agency.