Validating uk phone numbers

The entire pattern does not bother to check for balanced parentheses as these will be removed from the number in the next step. The pattern ends with an optional extension number arranged as an optional space or hyphen followed by x, ext and optional period, or #, followed by the extension number digits. Before you start, there are four concepts that need to be separated. These are "input format", "valid number range and valid number length for this range", "storage format" and "display format". intl-tel-input is a popular j Query plugin for entering and validating international telephone numbers.Below is some of its advanced features: There is an important note that the input must be revalidated when the user choose another country from the drop list.Many systems try to constrain the user to typing numbers in a particular format, and this is usually a very bad idea. The London number 020 3000 5555 can be written as (020) 3000 5555 or as 44 20 3000 5555, but you'll equally see people writing 02, (0203) 000 5555, 02030 005 555, 44 (0) 20 3000 5555, 44(0)2, 00 (44) 2030 005 555, ( 44 203) 000 5555, ( 44) 2, 011 44 2, and many others, and the same again each with hyphens in various positions. Most users do not properly understand how telephone numbers work nor the significance of the spaces and/or hyphens between country code, area code and local number.

Therefore, despite the fact that it doesn't cover all possible formats of phone number in the world, you can use the regexp validator to test a phone number in your country.

Alternatively, the initial opening parentheses are followed by a literal without a following space or hyphen. Note: These area codes are very rare in GB, and are only available in the following places: 13873 (Langholm), 15242 (Hornby-with-Farleton), 15394 (Hawkshead), 15395 (Grange-over-Sands), 15396 (Sedbergh), 16973 (Wigton), 16974 (Raughton Head), 16977 (Brampton), 17683 (Appleby-in-Westmorland), 17684 (Pooley Bridge), 17687 (Keswick), 19467 (Gosforth).

)$ The above pattern matches optional opening parentheses, followed by 00 or 011 and optional closing parentheses, followed by an optional space or hyphen, followed by optional opening parentheses. Enclose the area code part in parentheses when formatting these numbers.

Alternatively, the pattern matches optional initial opening parentheses followed by the 0 trunk code (national format).

Any of the previous two options are then followed by 44 with optional closing parentheses, followed by optional space or hyphen, followed by optional 0 in optional parentheses, followed by optional space or hyphen, followed by optional opening parentheses (international format).

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This also includes provision for optional closing parentheses and/or optional space or hyphen after where the user thinks the area code ends and the local subscriber number begins.

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