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Regular Expression Details

Title Test Find UK Phone Number in 5-3-3 Format
Expression
^[\d]{5}[-\s]{1}[\d]{3}[-\s]{1}[\d]{3}$
Description
Allows dashes or spaces to separate.
Matches
08000 333 333 | 08700-333-333 | 08440 333-333
Non-Matches
08000333333 | 08000=333=333 | 08000 333 333
Author Rating: Not yet rated. Matthew Harris
Source
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Existing User Comments

Title: Incomplete and incorrect.
Name: g1smd
Date: 10/28/2012 6:31:34 PM
Comment:
The ^[\d]{5}[-\s]{1}[\d]{3}[-\s]{1}[\d]{3}$ pattern is very inefficient. The [\d]{5} should be just \d{5} here. The [-\s]{1} should be just [\s-] here. The [\d]{3} should be just \d{3} here. However, this pattern matches only 4+6 format numbers. It fails to match valid UK 2+8, 3+7, 4+5, 5+5 and 5+4 format numbers. Use the pattern in http://www.regexlib.com/REDetails.aspx?regexp_id=3606 to validate the format, the pattern in http://www.regexlib.com/REDetails.aspx?regexp_id=3607 to extract the NSN, and the pattern in either http://www.regexlib.com/REDetails.aspx?regexp_id=3608 or http://www.regexlib.com/REDetails.aspx?regexp_id=3609 to validate the NSN.


Title: 5-3-3 is not a valid UK format.
Name: Steve.
Date: 11/4/2011 5:34:22 AM
Comment:
Most UK telephone numbers can have either 9 or 10 digits after the 0 trunk prefix. The initial 0 is omitted when calling from abroad. 01 and 02 area codes should have parentheses around them if the local number part does not begin with a 0 or 1. 01 and 02 area codes do not have parentheses around them if the local number part begins with a 0 or 1. These are National Dialling Only ranges. All other area codes do not have parentheses around them as the area code is required for all calls. Number formats are expressed as: 2+8 to represent (02x) xxxx xxxx [in 5 areas] or 05x xxxx xxxx or 070 xxxx xxxx or 076 xxxx xxxx. 3+7 to represent (011x) xxx xxxx [in 6 areas] or (01x1) xxx xxxx [in 6 areas] or 03xx xxx xxxx or 08xx xxx xxxx or 0800 xxx xxxx or 09xx xxx xxxx. 3+6 to represent 0500 xxxxxx or 0800 xxxxxx. 4+6 to represent (01xxx) xxxxxx [in 580 areas] or 07xxx xxxxxx. 4+5 to represent (01xxx) xxxxx [in 41 areas]. 5+5 to represent (01xx xx) xxxxx [in 12 areas]. 5+4 to represent (01xx xx) xxxx [in 1 area]. Valid formats include: (011x) - 3+7. (01x1) - 3+7. (01xxx) - 4+6 or 4+5. (01xx xx) - 5+5 or 5+4. (02x) - 2+8. 03xx - 3+7. 05x - 2+8. 0500 - 3+6. 07xxx - 4+6. 070 - 2+8. 076 - 2+8. 08xx - 3+7. 0800 - 3+7 or 3+6. 09xx - 3+7. There are a small number of exceptions such as 0800 1111 and 0845 4647. The UK system is quite complex!


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