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The original configuration of the North American Numbering Plan assigned eighty-six area codes in October 1947, one each to every numbering plan area. The territories of the United States, which included Alaska, and Hawaii, did not receive area codes at first, nor did the territories of Canada or Newfoundland and Labrador, which was a British ...
Feb 13, 2014 · New York, the most densely populated area of the nation, got 212—2-1-2 containing the lowest number of clicks possible on the rotary phone. Los Angeles got 213—the second-lowest—while ...
Ten-digit dialing. Ten-digit dialing is a telephone dialing procedure in the countries and territories that are members of the North American Numbering Plan (NANP). It is the practice of including the area code of a telephone number when dialing to initiate a telephone call. When necessary, the ten-digit number may be prefixed with the trunk ...
- History
- Administration
- Numbering Plan
- Non-Geographic Services
- Cellular Mobile Services
- Growth
- Dialing Procedures
- International Dialing
- Number Portability
- Toll Charges
From the Bell System's beginnings in 1876 and throughout the first part of the 20th century, telephone networks grew from essentially local or regional telephone systems. These systems expanded by increasing their subscriber bases, as well as increasing their service areas by implementing additional local exchanges that were interconnected with tie...
The NANP is administered by the North American Numbering Plan Administrator (NANPA, formerly Administration).This function is overseen by the Federal Communications Commission, which assumed the responsibility upon the end of the Bell System. The FCC solicits private sector contracts for the role of the administrator. Before the division of the Bel...
The long-range vision of the architects of the North American Numbering Plan was a system by which telephone subscribers in the United States and Canada could themselves dial and establish a telephone call to any other subscriber without the assistance of switchboard operators. While the dialing of telephone calls by subscribers was common-place in...
The North American Numbering Plan recognizes the need for non-geographic services by designating certain numbering blocks for such purposes. Many of these telephone numbers are selected from the easily recognizable codes(ERCs). System-wide toll-free calling, for which the receiving party is billed for the call, uses the number range with area codes...
The North American Numbering Plan does not reserve special non-geographic area codes exclusively for cellular phones, as is customary in some other national telephone administrations. Only one regional exception exists in area code 600in Canada. For cellular services, telephone numbers in the NANP are allocated within each area code from special ce...
Canada and the United States have experienced rapid growth in the number of area codes, particularly between 1990 and 2005. The widespread adoption of fax, modem, and mobile phone communication, as well as the deregulation of local telecommunication services in the United States during the mid-1990s, increased the demand for telephone numbers. The ...
The structure of the North American Numbering Plan permits implementation of local dial plans in each plan area, depending on requirements. When multiple NPA codes serve an area in an overlay arrangement, ten-digit (10D) dialing is required. Seven-digit (7D) dialing may be permissible in areas with single area codes. Depending on the requirement of...
While direct dialing of international calls was available in some locations in the United States by the late 1950s, a continental system was introduced asInternational Direct Distance Dialing(IDDD) for the territories of the North American Numbering Plan in March 1970. IDDD was implemented through extensive modifications in the switching systems to...
The Telecommunications Act of 1996 (47 U.S.C. § 251 (b)(2)) authorizes the Federal Communications Commission (FCC) to require all local exchange carriers (LECs) to offer local number portability. The FCC regulations were enacted on June 27, 1996, with changes to take effect in the one hundred largest Metropolitan Statistical Areasby October 1, 1997...
Telephone calls between countries and territories of the NANP are not typically charged at domestic rates. For example, most long-distance plans may charge a California subscriber a higher rate for a call to British Columbia than for a call to New York, even though both destinations are within the NANP. Similarly, calls from Bermuda to U.S. destina...
In 1947, states and provinces that had a single area code we assigned three digit codes with 0 as the middle number, such as 203 for Connecticut and 305 for Florida . There were 86 area codes at that time. States and provinces that had more than one area code distributed to them were given three digit codes with 1 as the middle number, such as ...
Nov 10, 2018 · On Nov. 10, 1951, area codes were introduced in the United States, Canada and parts of the Caribbean, allowing direct-dialing of long-distance telephone calls.
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Feb 22, 2019 · A call to the 212 area code required only 5 pulses, while a call to the 605 area code (South Dakota) required 21. Because the called number was signaled inband on the trunk circuit, the circuit was in use (and could not be used for another call) – but not generating any toll revenue, because the call was not completed – for the time that the called number was being signaled.
