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The letters have also been used, mainly in the United States, as a technique for remembering telephone numbers easily. For example, an interior decorator might license the telephone number 1-800-724-6837, but advertise it as the more memorable phoneword "1-800-PAINTER". Sometimes businesses advertise a number with a mnemonic word having more ...
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The total length of all phone numbers (area code and the phone number) is constant at 10 digits. For example, the number 7513200000 signifies the area code 751 (the area code for Gwalior) followed by the phone number. Fixed-line or landline numbers are at most 8 digits long.
Mobile phone numbers are not uniquely different from land-line numbers, and thus follow the same rules for format and area code. Numbers may be ported between landline and mobile . The rarely used non-geographic area code 600 is an exception to this pattern (non-portable, and allows caller-pays-airtime satellite telephony ); some independent ...
The current format of 7 digit telephone numbers was adopted on 3 June 1995, when 1 to 3 numbers (depending on region) were added to numbers to standardise on number length. At this time, the international direct dialling code became 00 (previously 90), in line with ITU recommendations.
1.1 Number format. 1.2 National area codes. 2 Mobile numbers. Toggle Mobile numbers subsection. ... Polish telephone numbers have had 9 digits since 30 September 2009 ...
Numbers starting with 0 and 1 are used to compose short numbers or for prefixes. For example, three-digit numbers starting with 0 are for emergency and services to the citizen. Non-emergency numbers are 010 for requesting information to the city council, 012 to the regional government, and 060 to the national government.
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]