Regular Expressions 101

Explanation

Pro

^start of line

00the literal text 00

\da digit

Negative Lookahead(?!51)

51the literal text 51

\d{8,11}a digit, repeated between 8 and 11 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

^00\d(?!51)\d{8,11}$

New

0035196916180
0033749593254
0035741368965

0035196916180
0033749593254
0035741368965