Local conventions for writing telephone numbers
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Every country has different local conventions for writing telephone numbers. Writing a number in a different format will look strange to a resident, and may lead to incorrect dialing when area codes are omitted for local calls.
All numbers on this page are written for dialing within that country, and do not include any international dialing codes. In examples, a numeric digit is used only if the digit is the same in every number, and letters to illustrate groups. X is used as a wildcard to represent any digits in lists of numbers.
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[edit] North America
[edit] United States, Canada, and other NANP countries
24 countries and territories share the North American Numbering Plan, with a single country code and dialing plan.
Numbers are written as 1-AAA-BBB-BBBB', where 1 is the long distance access code, AAA is the area code, and BBB-BBBB is the subscriber number.
All area codes are the same length. Large areas use multiple area codes.
[edit] Europe
[edit] France
French telephone numbers are ten digits long, and written in groups of two separated by spaces, for example, 0A AA AA AA AA.
[edit] Denmark
Danish telephone numbers are 8 digits long, and normally written in four groups of two separated by spaces, AA AA AA AA. In recent years it has also become common to write them in two groups of four, AAAA AAAA
[edit] United Kingdom
United Kingdom telephone numbers are complex due to varying size of area code, and a history of inadequate changes to increase the number of available telephone numbers.
Numbers are formatted as 0AAAA BBBBBB, where 0AAAA is the STD (area) code, and BBBBBB is the subscriber code. However, both are variable length. Larger areas have shorter STD codes. The subscriber code is split into two blocks of four if it is eight digits long (eg 020 1234 5678).
The majority of area codes are five digits long, including the 0 prefix. Exceptions are 02X, 0113, 0114, 0115, 0116, 0117, 0121, 0131, 0141, 0151, 0161, 0191, 08XX and 09XX.
