Regular Expressions 101

^start of line

Non-Capturing Group(?:\d{4,5}\w{0,2}(?:\.\w{1,2})?|\w{3}-\d{6})

1st Alternative\d{4,5}\w{0,2}(?:\.\w{1,2})?

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

\w{0,2}any word character, repeated between 0 and 2 times

Non-Capturing Group(?:\.\w{1,2})?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w{1,2}any word character, repeated between 1 and 2 times

2nd Alternative\w{3}-\d{6}

\w{3}any word character, repeated exactly 3 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{6}a digit, repeated exactly 6 times

$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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(?:\d{4,5}\w{0,2}(?:\.\w{1,2})?|\w{3}-\d{6})$