Regular Expressions 101

^start of line

Non-Capturing Group(?:0|63)?

?repeats the group contents below at most once:

1st Alternative0

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

2nd Alternative63

63the literal text 63

\d{10}a digit, repeated exactly 10 times

\ban ASCII word boundary

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

^(?:0|63)?\d{10}\b

New

09187654321
09187654321
6311111111
631111111111
06311111111


63111111111
011111111