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This is a list of articles about prime numbers.A prime number (or prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. By Euclid's theorem, there are an infinite number of prime numbers.
Since the introduction of number portability, there is no longer a fixed relationship between the mobile phone number and the network it uses. In 2015 the 05 prefix (other than 0550) was also reserved for digital mobile phones as a part of the Telecommunications Numbering Plan 2015. However, as of 2019 no numbers have been allocated with this ...
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
In rural areas with magneto crank telephones connected to party lines, the local phone number consisted of the line number plus the ringing pattern of the subscriber. To dial a number such as "3R122" meant making a request to the operator the third party line (if making a call off your own local one), followed by turning the telephone's crank ...
Before 1993, telephone numbers would consist either of a two-digit area code and a six-digit subscriber number in cities and large towns, for example, (02) 412702 in Oslo, [1] or a three-digit area code and a five-digit subscriber number in smaller towns, for example, (034) 83000 in Larvik.
This is a discussion of telephone numbers in Ukraine.The nation of Ukraine has country code +380.It switched to the European Union's common dialing plan in 2009. Thus, Ukrainian phone numbers consist of a 2-digit zone code, an optional subzone code, an optional filler (zero to two "2 " 's), and the local phone number (five to seven digits).
A typical mobile phone number is written as 01M-XXX YYYY or 01M-XXXYYYY. Toll-free and local charge numbers are written as 1-800-XX-YYYY and 1-300-XX-YYYY respectively, while premium rate numbers are written as 600-XX-YYYY.
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. [6] 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.
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