regex101: UK - Postalcodes

Explanation

Pro

1st Alternative(?:[A-Za-z]\d ?\d[A-Za-z]{2})

Non-Capturing Group(?:[A-Za-z]\d ?\d[A-Za-z]{2})

Character Class[A-Za-z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

\da digit

?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

\da digit

Character Class[A-Za-z]{2}

{2}matches exactly 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

2nd Alternative(?:[A-Za-z][A-Za-z\d]\d ?\d[A-Za-z]{2})

Non-Capturing Group(?:[A-Za-z][A-Za-z\d]\d ?\d[A-Za-z]{2})

Character Class[A-Za-z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Character Class[A-Za-z\d]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

\da digit

?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

\da digit

Character Class[A-Za-z]{2}

{2}matches exactly 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

3rd Alternative(?:[A-Za-z]{2}\d{2} ?\d[A-Za-z]{2})

Non-Capturing Group(?:[A-Za-z]{2}\d{2} ?\d[A-Za-z]{2})

Character Class[A-Za-z]{2}

{2}matches exactly 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

\d{2}a digit, repeated exactly 2 times

?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

\da digit

Character Class[A-Za-z]{2}

{2}matches exactly 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

4th Alternative(?:[A-Za-z]\d[A-Za-z] ?\d[A-Za-z]{2})

Non-Capturing Group(?:[A-Za-z]\d[A-Za-z] ?\d[A-Za-z]{2})

Character Class[A-Za-z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

\da digit

Character Class[A-Za-z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

\da digit

Character Class[A-Za-z]{2}

{2}matches exactly 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

5th Alternative(?:[A-Za-z]{2}\d[A-Za-z] ?\d[A-Za-z]{2})

Non-Capturing Group(?:[A-Za-z]{2}\d[A-Za-z] ?\d[A-Za-z]{2})

Character Class[A-Za-z]{2}

{2}matches exactly 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

\da digit

Character Class[A-Za-z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

\da digit

Character Class[A-Za-z]{2}

{2}matches exactly 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

the literal ↵ (10₁₀ / 12₈ / A₁₆)

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

Quick Reference

25 tokens

Regular Expression

(?:[A-Za-z]\d ?\d[A-Za-z]{2})|(?:[A-Za-z][A-Za-z\d]\d ?\d[A-Za-z]{2})|(?:[A-Za-z]{2}\d{2} ?\d[A-Za-z]{2})|(?:[A-Za-z]\d[A-Za-z] ?\d[A-Za-z]{2})|(?:[A-Za-z]{2}\d[A-Za-z] ?\d[A-Za-z]{2})

Unit Tests

There are no unit tests.