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})

New

EC1A 1BB
W1A 0AX
M1 1AE
B33 8TH
CR2 6XH
DN55 1PT
QN55 1PT
DI55 1PT
W1Z 0AX
EC1Z 1BB
DN55 1CT
A11A 1AA
AA11A 1AA
AA11 1AAA
AA11 1AAA
AAA 1AA
AA 1AA
A 1AA
1A 1AA
1 1AA
11 1AA
AA1 1A
AA1 1

Extraction

EC1A 1BB
W1A 0AX
M1 1AE
B33 8TH
CR2 6XH
DN55 1PT
QN55 1PT
DI55 1PT
W1Z 0AX
EC1Z 1BB
DN55 1CT
A11A 1AA
AA11A 1AA
AA11 1AAA
AA11 1AAA
AAA 1AA
AA 1AA
A 1AA
1A 1AA
1 1AA
11 1AA
AA1 1A
AA1 1