Regex for UK mobile number
UK mobile in 07XXX or +44 7XXX format.
The pattern
^(\+44\s?|0)7\d{3}\s?\d{6}$
What it matches
07911 123456+44 7911 123456+447911123456
What it doesn't match
08911 123456+44 1234 56789007 9111 23456
Notes & gotchas
UK mobiles start with 07 (or +44 7). All UK mobile numbers are 11 digits including the leading 0, or 12 with +44 prefix.
Code in your language
Use the explainer's Code tab to generate ready-to-paste snippets in JavaScript, Python, Java, .NET, Go, Ruby, and PHP for this pattern.
Open in explainer →About this pattern
UK identifier formats are set by HMRC, Royal Mail, and the BACS payments scheme. The regex here matches the format; full validation may need an additional checksum or lookup.
Quick usage in different languages
Once you've validated a candidate value matches this pattern, you'll typically use it inside your application code. Each language has its own regex syntax:
- JavaScript:
new RegExp(pattern).test(value)or/pattern/.test(value) - Python:
re.match(pattern, value)with raw strings:r"pattern" - Java:
Pattern.compile(pattern).matcher(value).matches() - C# / .NET:
Regex.IsMatch(value, pattern) - Go:
regexp.MustCompile(pattern).MatchString(value)— Go uses RE2 so some advanced features aren't available - Ruby:
value =~ /pattern/orpattern.match?(value) - PHP:
preg_match('/pattern/', $value)
The explainer's Code tab generates these for any pattern you paste — including the right escaping and idioms for each language.
Common pitfalls
- Anchors matter. The pattern starts with
^and ends with$— it expects the entire input to match. To find this pattern inside a longer text, remove the anchors and use the/gflag for multiple matches. - Case sensitivity. Letter ranges like
[A-Z]only match uppercase. Use theiflag or[A-Za-z]for case-insensitive matching. - Escape user input. If you're building a regex from a string variable, escape regex metacharacters first to avoid bugs or injection — use
RegExp.escape-equivalents in your language. - Performance. For this specific pattern the risk is low, but be cautious of nested quantifiers when adapting it — they can cause exponential backtracking on adversarial input.
See also
Browse all 300 patterns in the library, or open this regex in the interactive explainer to see a token-by-token breakdown, test against custom input, and generate code in seven languages.