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A telephone number is a sequence of digits assigned to a landline telephone subscriber station connected to a telephone line or to a wireless electronic telephony device, such as a radio telephone or a mobile telephone, or to other devices for data transmission via the public switched telephone network (PSTN), or other public and private networks.
Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, and 888.Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future.
The Telephone and Its Several Inventors: A History. Jefferson, NC: McFarland & Co. Evenson, A. Edward (2000). The Telephone Patent Conspiracy of 1876: The Elisha Gray – Alexander Bell Controversy. Jefferson, NC: McFarland & Co. Fischer, Claude S. (1994) America calling: A social history of the telephone to 1940 (Univ of California Press, 1994)
Area code Operator code Operator Type 0xx 0 Lanka Bell [Discontinued] : Fixed wireless LTE 1 Unallocated — 2 SLT-MOBITEL: Fixed Fibre/Copper 3 Fixed wireless LTE
59xxxxxx – Mobile phone number; 6xxxxxxx – Mobile phone number; 7xxxxxxx – Mobile phone number & pager number; 800xxxxxx – Toll-free telephone number; 81xxxxxx to 83xxxxxx – Personal number service; 84xxxxxx to 87xxxxxx – Mobile phone number; 89xxxxxx – Mobile phone number; 900xxxxxxxx – Information service; 901xxxxx to 989xxxxx ...
Telephone numbers in Italy are managed by the Autorità per le Garanzie nelle Comunicazioni (AGCOM), a national regulatory authority for the communication industry located in Rome. Italian telephone numbers are defined by an open telephone numbering plan that assigns subscriber telephone numbers of six to eleven digits. In addition, other short ...
Until 1985, subscribers' telephone numbers in Singapore were five and six digits. Five digits were introduced in 1960s, whereas 5-digit and 6-digit phone numbers were introduced in 1960s as fixed lines grew, but in that year, these changed to seven digits as the introduction of new towns arose (Tampines, Jurong East, Bukit Batok, Yishun and Hougang) and a large number of new numbers were required.
A telephone keypad is a keypad installed on a push-button telephone or similar telecommunication device for dialing a telephone number. It was standardized when the dual-tone multi-frequency signaling (DTMF) system was developed in the Bell System in the United States in the 1960s – this replaced rotary dialing , that had been developed for ...