Regular Expressions 101

Pro

^start of line

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

Non-Capturing Group(?:(?:\.\d{2}){3}|\d{6})

1st Alternative(?:\.\d{2}){3}

Non-Capturing Group(?:\.\d{2}){3}

{3}repeats the group contents below exactly 3 times:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

2nd Alternative\d{6}

\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.

25 tokens

^\d{2}(?:(?:\.\d{2}){3}|\d{6})$

New

12.45.7810
12345678
12.34.56.78
1.234.56.78
12.45.7816

12.45.7810
12345678
12.34.56.78
1.234.56.78
12.45.7816