Regular Expressions 101

Pro

Negative Lookbehind(?<!\d)

\da digit

\d{11}a digit, repeated exactly 11 times

000the literal text 000

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

Negative Lookahead(?!\d)

\da digit

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)\d{11}000\d{2}(?!\d)

New

1234567890100012
abc1234567890100012abc
99991234567890100012
12345678901000129999

1234567890100012
abc1234567890100012abc
99991234567890100012
12345678901000129999