Wide Area Telephone Service (WATS) was a flat-rate long-distance service for customer dial-type telecommunications in the service areas of the North American...

numbers. This Inward Wide Area Telephone Service (InWATS) allowed calls to be made directly from anywhere in a predefined area by dialling the prefix...

The original North American area codes were established by the American Telephone and Telegraph Company (AT&T) in 1947, after the demonstration of regional...

Trap and trace TWX Vertical service code Voicemail Voice over Internet Protocol (VoIP) Western Union Wide Area Telephone Service (WATS) WATS line Wireless...

Area Transit System, a transit agency serving Warrick County, Indiana Wide Area Telephone Service, a phone service for U.S. telecommunications Wide Area...

toll-free telephone numbers were assigned with area code 800, created as inbound Wide Area Telephone Service (InWATS) in 1966 (U.S. intrastate) and 1967...

short-form as NPA code or simply area code. The area code is prefixed to each telephone number issued in its service area. Other national telecommunication...

initial zero). Regions with shorter area codes, typically large cities, permit the allocation of more telephone numbers as the local number part has...

A wide area network (WAN) is a telecommunications network that extends over a large geographic area. Wide area networks are often established with leased...

call in the U.K. [citation needed]) is a telephone call made to a location outside a defined local calling area. Long-distance calls are typically charged...

disorder to place calls to standard telephone users via a keyboard or assistive device. Originally, relay services were designed to be connected through...

exception exists in area code 600 in Canada. For cellular services, telephone numbers in the NANP are allocated within each area code from central offices...

Area codes 408 and 669 are telephone area codes in the North American Numbering Plan (NANP) in the U.S. state of California. The numbering plan area comprises...

Area codes 213, 323, and 738 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California. They are assigned...

provided logistical support, such as the use of its Wide Area Telephone Service (WATS) lines and the services of the Medical Committee on Human Rights, organized...

Area codes 416, 647, and 437 are telephone area codes in the North American Numbering Plan (NANP) for the city of Toronto, Ontario, Canada. Area code 416...

area, the area code is not needed, save for a handful of areas that do require this. When calling from a mobile telephone or through a VoIP service,...

Area codes 415 and 628 are telephone area codes in the North American Numbering Plan (NANP) for the city of San Francisco and its northern suburbs in...

Wireless wide area network (WWAN), is a form of wireless network. The larger size of a wide area network compared to a local area network requires differences...

American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan and assigned the original North American area codes...

Area code 951 is a telephone area code in the North American Numbering Plan for western Riverside County in the southern part of the U.S. state of California...

403 in the first continent-wide telephone numbering plan by the American Telephone and Telegraph Company (AT&T). When service became available from local...

codes have been rationalised into wider area codes. Such was the demand for lines in London that the city's telephone area was first split into two separate...

Area codes 714 and 657 are telephone area codes in the North American Numbering Plan (NANP) for the southern part of the U.S. state of California. The...

Area codes 909 and 840 are telephone area codes in the North American Numbering Plan for the far-eastern part of Los Angeles County, southwestern San...

distance dialing (DDD) for content-wide service using a seven-digit local telephone number, prefixed by a three-digit area code, Montreal and Toronto, the...

Area codes 516 and 363 are telephone overlay area codes in the North American Numbering Plan (NANP) for the U.S. state of New York. The numbering plan...

Area codes 503 and 971 are telephone area codes in the North American Numbering Plan (NANP) for the northwestern region of the U.S. state of Oregon. The...

United States, the demand for telephone service outpaced the scalability of the alphanumeric system and after introduction of area codes for direct-distance...

02, later 021 telephone line service (possibly telephone service, if bought or rented from the telephone company) 023 elevators service (only in Bucharest)...