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In North America, the area served by the North American Numbering Plan (NANP) system of area codes, fictitious telephone numbers are usually of the form (XXX) 555-xxxx. The use of 555 numbers in fiction, however, led a desire to assign some of them in the real world, and some of them are no longer suitable for use in fiction.
979 – Universal International Premium Rate Service (UIPRS); (formerly assigned to Abu Dhabi, now part of 971 United Arab Emirates) 98 – Iran. 990 – unassigned. 991 – unassigned (formerly used for International Telecommunications Public Correspondence Service) 992 – Tajikistan.
History. The first use of a national emergency telephone number began in the United Kingdom in 1937 using the number 999, which continues to this day. In the United States, the first 911 service was established by the Alabama Telephone Company and the first call was made in Haleyville, Alabama, in 1968 by Alabama Speaker of the House Rankin Fite and answered by U.S. Representative Tom Bevill.
A telecommunications relay service, also known as TRS, relay service, or IP-relay, or Web-based relay service, is an operator service that allows people who are deaf, hard of hearing, deafblind, or have a speech disorder to place calls to standard telephone users via a keyboard or assistive device. Originally, relay services were designed to be ...
Kenmore 9392 is a five-pull (1L-4N) small-city telephone number for the Kenmore exchange in Fort Wayne, Indiana. MArket 7032 is a six-digit (2L-4N) telephone number. This format was in use from the 1920s through the 1950s, and was phased out c. 1960. BALdwin 6828 is an urban 3L-4N example, used only in the largest cities before conversion to ...
To verify that a telephone number exists and authorize its use, subscribers supply a telephone number on which to establish service, often via a web page. A unique code is first indicated or displayed to the customer via the web site, then an automated call is then placed to the supplied subscriber telephone number.
Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1] – defined as "A transmitter-receiver associated with a fixed navigational mark which, when triggered by a radar, automatically returns a distinctive signal which can appear on the display of the ...
112 (emergency telephone number) 112 is a common emergency telephone number that can be dialed free of charge from most mobile telephones, and in some countries, fixed telephones in order to reach emergency services (ambulance, fire and rescue, police). 112 is a part of the GSM standard and all GSM-compatible telephone handsets are able to dial ...
00 800 – Freephone / toll free (from all Irish mobile and landlines. 8-digit numbers in the format 00 800 xxxx xxxx. Where high volume 'bursty traffic' is anticipated, such as on-air radio competition lines, the first two digits of the phone number are always 71. For example: 1800 71 x xxx or 0818 71 x xxx.
Ringback number. A ringback number is a telephone number for a telephone line that automatically calls the line that the call was placed from, after the caller has hung up. The typical use of this facility is by telephone company technicians for testing a new installation or for trouble-shooting. [1]