Regular Expressions 101

^start of line

Group 1([A-Za-z0-9]{2})

Character Class[A-Za-z0-9]{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)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group 2([0-9]{2})

Character Class[0-9]{2}

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group 3((?:[A-R][0-9]{2}){0,10})

Non-Capturing Group(?:[A-R][0-9]{2}){0,10}

{0,10}repeats the group contents below between 0 and 10 times:

Character Class[A-R]

A-Rone character from A (65₁₀) to R (82₁₀) (case sensitive)

Character Class[0-9]{2}

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group 4((?:[0-9]{4}){0,12})

Non-Capturing Group(?:[0-9]{4}){0,12}

{0,12}repeats the group contents below between 0 and 12 times:

Character Class[0-9]{4}

{4}matches exactly 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group 5((?:[A-Z])?)

Non-Capturing Group(?:[A-Z])?

?repeats the group contents below at most once:

Character Class[A-Z]

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

$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

Ready to run

Search reference

Regular Expression

^([A-Za-z0-9]{2})([0-9]{2})((?:[A-R][0-9]{2}){0,10})((?:[0-9]{4}){0,12})((?:[A-Z])?)$