regex101: UK Telephone Numbers

^start of line

Non-Capturing Group(?:(?:$?(?:0(?:0|11)$?[\s-]?$?|\+)44$?[\s-]?(?:$?0$?[\s-]?)?)|(?:\(?0))

1st Alternative(?:$?(?:0(?:0|11)$?[\s-]?$?|\+)44$?[\s-]?(?:$?0$?[\s-]?)?)

Non-Capturing Group(?:$?(?:0(?:0|11)$?[\s-]?$?|\+)44$?[\s-]?(?:$?0$?[\s-]?)?)

\(?optionally matches the literal ( (40₁₀ / 50₈ / 28₁₆)

Non-Capturing Group(?:0(?:0|11)\)?[\s-]?\(?|\+)

1st Alternative0(?:0|11)\)?[\s-]?\(?

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Non-Capturing Group(?:0|11)

1st Alternative0

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

2nd Alternative11

11the literal text 11

\)?optionally matches the literal ) (41₁₀ / 51₈ / 29₁₆)

Character Class[\s-]?

?matches at most one character from the set below:

\sany whitespace character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\(?optionally matches the literal ( (40₁₀ / 50₈ / 28₁₆)

2nd Alternative\+

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

44the literal text 44

\)?optionally matches the literal ) (41₁₀ / 51₈ / 29₁₆)

Character Class[\s-]?

?matches at most one character from the set below:

\sany whitespace character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Non-Capturing Group(?:$?0$?[\s-]?)?

?repeats the group contents below at most once:

\(?optionally matches the literal ( (40₁₀ / 50₈ / 28₁₆)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\)?optionally matches the literal ) (41₁₀ / 51₈ / 29₁₆)

Character Class[\s-]?

?matches at most one character from the set below:

\sany whitespace character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

2nd Alternative(?:\(?0)

Non-Capturing Group(?:\(?0)

\(?optionally matches the literal ( (40₁₀ / 50₈ / 28₁₆)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Non-Capturing Group(?:(?:\d{5}\)?[\s-]?\d{4,5})|(?:\d{4}\)?[\s-]?(?:\d{5}|\d{3}[\s-]?\d{3}))|(?:\d{3}\)?[\s-]?\d{3}[\s-]?\d{3,4})|(?:\d{2}\)?[\s-]?\d{4}[\s-]?\d{4}))

1st Alternative(?:\d{5}\)?[\s-]?\d{4,5})

Non-Capturing Group(?:\d{5}\)?[\s-]?\d{4,5})

\d{5}a digit, repeated exactly 5 times

\)?optionally matches the literal ) (41₁₀ / 51₈ / 29₁₆)

Character Class[\s-]?

?matches at most one character from the set below:

\sany whitespace character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{4,5}a digit, repeated between 4 and 5 times

2nd Alternative(?:\d{4}\)?[\s-]?(?:\d{5}|\d{3}[\s-]?\d{3}))

Non-Capturing Group(?:\d{4}\)?[\s-]?(?:\d{5}|\d{3}[\s-]?\d{3}))

\d{4}a digit, repeated exactly 4 times

\)?optionally matches the literal ) (41₁₀ / 51₈ / 29₁₆)

Character Class[\s-]?

?matches at most one character from the set below:

\sany whitespace character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Non-Capturing Group(?:\d{5}|\d{3}[\s-]?\d{3})

1st Alternative\d{5}

\d{5}a digit, repeated exactly 5 times

2nd Alternative\d{3}[\s-]?\d{3}

\d{3}a digit, repeated exactly 3 times

Character Class[\s-]?

\d{3}a digit, repeated exactly 3 times

3rd Alternative(?:\d{3}\)?[\s-]?\d{3}[\s-]?\d{3,4})

4th Alternative(?:\d{2}\)?[\s-]?\d{4}[\s-]?\d{4})

Non-Capturing Group(?:[\s-]?(?:x|ext\.?|\#)\d{3,4})?

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

^(?:(?:\(?(?:0(?:0|11)\)?[\s-]?\(?|\+)44\)?[\s-]?(?:\(?0\)?[\s-]?)?)|(?:\(?0))(?:(?:\d{5}\)?[\s-]?\d{4,5})|(?:\d{4}\)?[\s-]?(?:\d{5}|\d{3}[\s-]?\d{3}))|(?:\d{3}\)?[\s-]?\d{3}[\s-]?\d{3,4})|(?:\d{2}\)?[\s-]?\d{4}[\s-]?\d{4}))(?:[\s-]?(?:x|ext\.?|\#)\d{3,4})?$

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Regular Expressions 101

Regular Expression

Extraction