Risultati di ricerca
The original North American area codes were established by the American Telephone and Telegraph Company (AT&T) in 1947, after the demonstration of regional Operator Toll Dialing during the World War II period.
- Lists of North American area codes - Wikipedia
Original North American area codes. List of North American...
- List of North American Numbering Plan area codes - Wikipedia
List of North American Numbering Plan area codes -...
- North American Numbering Plan - Simple English Wikipedia, the free ...
The North American Numbering Plan (NANP) is a telephone...
- Lists of North American area codes - Wikipedia
In 1947, AT&T completed the new design for a nationwide toll network that established the original North American area codes. The new numbering plan provided for 152 area codes, each with a capacity to serve as many as 540 central offices. [26]
- 1
- 011
- +1 NXX NXX-XXXX
NANP non-geographic. References. Other websites. List of North American Numbering Plan area codes. This is a list of North American telephone area codes in effect for the North American Numbering Plan (NANP). The area to which an area code is officially assigned is known as a Numbering Plan Area (NPA).
Original Area Codes. ORIGINAL AREA CODES - UNITED STATES AND CANADA. In 1947 the North American Numbering Plan (NANP) was established and 86 original area codes were geographically assigned to states and provinces in the United States and Canada. All area codes were three digits as they are today.
