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another uk telephone number regex. This was adapted from another on this site http://www.regexlib.com/REDetails.aspx?regexp_id=297 I added support for hyphens and for london shorthand numbers ie. 8234-1234 72341234 Still want to be permissive where possible....Still need to sort out the all zeros, also not sure if numbers with 4 digits followed by 7 used in london 0208-234-1234 is the area of the uk where this occurs, or all areas outside of london are in format 5 digits followed by 6 digits ie. 01608 123456. If that is the case for the 4-7 pattern only 0208 or 0207 could be enforced.

another uk telephone number regex. This was adapted from another on this site http://www.regexlib.com/REDetails.aspx?regexp_id=297 I added support for hyphens and for london shorthand numbers ie. 8234-1234 72341234 Still want to be permissive where possible....Still need to sort out the all zeros, also not sure if numbers with 4 digits followed by 7 used in london 0208-234-1234 is the area of the uk where this occurs, or all areas outside of london are in format 5 digits followed by 6 digits ie. 01608 123456. If that is the case for the 4-7 pattern only 0208 or 0207 could be enforced.

This will match valid UK telephone numbers. This adheres to ofcom's code and number length guide available at http://www.ofcom.org.uk/licensing_numbering/numbers/num_user_guide#1b Brackets and international codes are not allowed. A space MUST be used after the dialling code, and spaces at the expected points within the remainder of the number can be used if need be, but not nessesary, hence 0208 6473 373 is the same as 0208 647 3373 and 0208 6473373

Validates UK domestic landline phone numbers. Valid formats are: 029 99999999 or 029 9999 9999; 0199 9999999 or 0199 999 9999; 01999 99999; 01999 999999; 019999 9999; 019999 99999. These formats are taken from the official guidelines from Ofcom, the organisation responsible for UK telecoms issues. Brackets are not valid and STD code must be entered.

Validates UK mobile phone numbers. Valid formats are `077', `078' or `079' followed by another 8 digits, with an optional space after the dialling code and/or between the 4th and 5th characters of the remainder of the number. These formats are taken from the official guidelines from Ofcom, the organisation responsible for UK telecoms issues. Brackets are not valid and STD code must be entered.

This regex matches UK phone numbers in multiple formats, including those that begin with the international dial code and optionally bracket the leading zero of the area code. To match a number must begin with either +44 or 0 and have 9-12 following digits.

Matches most common patterns for UK telephone numbers including +44 prefix , and with or without brackets. Covers 10 and 11 digit number ranges. Should be easy to modify for other number ranges.

Matches over 18 different combinations for UK phone numbers that I could find. If there are any errors please get in touch.

Allows both mobile and landline UK Telephone Numbers. Allows either Brackets or international prefix. Allows spaces after international prefix and regional code. No brackets for mobile numbers. Please report any problems. Thanks

Step 1: Test that the input is a UK phone number. Later patterns extract the prefix, NSN and extension, and further tests check the NSN for length and validity. 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. Alternatively, the opening parentheses are followed by a literal + without a following space or hyphen. Any of the previous 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). Alternatively, the pattern matches optional opening parentheses followed by the 0 trunk code (national format). This is followed by the area code and phone number in 2+8, 3+7, 3+6, 4+6, 4+5, 5+5 or 5+4 format with or without spaces and/or hyphens. 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 number begins. The pattern allows any format to be used with any UK number. The display format must be corrected by later logic if the wrong format for this number has been used by the user on input. The pattern finally ends with optional space or hyphen followed by x, ext and optional period, or #, followed by a three or four digit extension number. Once the input has been confirmed as being a telephone number using the above pattern, another RegEx pattern should extract prefix, NSN and extension and then the NSN should be further tested for length and validity. (Order fixed for even greater efficiency: shorter area codes match first.)

Step 2: After step 1 has verified the input is likely to be a UK telephone number, this pattern extracts the NSN part of the number so that it can be passed to another routine that will check it for length and validity. $1 is 44 (international format) or null (use 0 for trunk code - national format). $2 is the NSN. $3 is the extension number.

Step 3: Validate the NSN produced from the pattern in step 2 and check it for length and validity. The pattern here is fairly basic. More detailed patterns for each number type are available elsewhere. Step 4 is to format the number correctly. This needs a variety of RegEx patterns each based on the initial digits and number length.

Step 3: Validate the NSN produced from the pattern in step 2 and check it for length and validity. The pattern here is very detailed matching every valid UK prefix, and rejecting large numbers of non-valid ranges. Step 4 will be to format the number correctly. This needs a variety of RegEx patterns each based on the initial digits and number length as shown in the article mentioned below.

Follows http://en.wikipedia.org/wiki/Telephone_numbers_in_the_United_Kingdom must have a specific length and be a valid telephone number in the UK Must start with a 0, have included 01 02 03 05 08 numbers. character spacing have be " ", "-", accepts 01 02 03 05 07 08 numbers, rejects everything else.

Validates UK phone numbers based on the Wikipedia page http://en.wikipedia.org/wiki/Telephone_numbers_in_the_United_Kingdom including the international dialing code 0044/+44/44