Regular Expressions 101

Pro

^start of line

Negative Lookahead(?!.*(\d)\1{5})

.*any character (except for line terminators), repeated any number of times

Group 1(\d)

\da digit

\1{5}the text saved by group 1, repeated exactly 5 times

Character Class[6-9]

6-9one character from 6 (54₁₀) to 9 (57₁₀)

\d{9}a digit, repeated exactly 9 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)\1{5})[6-9]\d{9}$

New

6234567890
7234567890
8234567890
9234567890

1234567890
9234000000
0123456789
92345678900

6234567890
7234567890
8234567890
9234567890

1234567890
9234000000
0123456789
92345678900