Regular Expressions 101

\ban ASCII word boundary

Character Class[2-9]

2-9one character from 2 (50₁₀) to 9 (57₁₀)

Character Class[0-9]{3}

{3}matches exactly 3 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Negated Character Class[^\S\r\n]

\Sany non-whitespace character

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Character Class[0-9]{4}

{4}matches exactly 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Negated Character Class[^\S\r\n]

\Sany non-whitespace character

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Character Class[0-9]{4}

{4}matches exactly 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\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.

25 tokens

Regular Expression

\b[2-9][0-9]{3}[^\S\r\n][0-9]{4}[^\S\r\n][0-9]{4}\b

New

2355 2345 7868 aaa 2355 2345 7868
2355
2345
7868
1355 2345 7868
235 2345 7868
2355 2345 786
2A55 2345a7868
235523457868

2355 2345 7868 aaa 2355 2345 7868
2355
2345
7868
1355 2345 7868
235 2345 7868
2355 2345 786
2A55 2345a7868
235523457868