Regular Expressions 101

^start of string

Group 1([2-3]{1})

Character Class[2-3]{1}

{1}matches one character from the set below:

2-3one character from 2 (50₁₀) to 3 (51₁₀)

Group 2([0-9]{2})

Character Class[0-9]{2}

{2}matches exactly 2 characters from the set below:

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

Group 3(0[1-9]|1[012])

1st Alternative0[1-9]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

2nd Alternative1[012]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[012]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Group 4(0[1-9]|[1-2][0-9]|3[0-1])

1st Alternative0[1-9]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

2nd Alternative[1-2][0-9]

Character Class[1-2]

1-2one character from 1 (49₁₀) to 2 (50₁₀)

Character Class[0-9]

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

3rd Alternative3[0-1]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[0-1]

0-1one character from 0 (48₁₀) to 1 (49₁₀)

Group 5(0[1-4]|[1-2][1-9]|3[1-5]|88)

1st Alternative0[1-4]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-4]

1-4one character from 1 (49₁₀) to 4 (52₁₀)

2nd Alternative[1-2][1-9]

Character Class[1-2]

1-2one character from 1 (49₁₀) to 2 (50₁₀)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

3rd Alternative3[1-5]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[1-5]

1-5one character from 1 (49₁₀) to 5 (53₁₀)

4th Alternative88

Character Class[0-9]{3}

Group 6([0-9]{1})

Character Class[0-9]{1}

$end of string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^([2-3]{1})([0-9]{2})(0[1-9]|1[012])(0[1-9]|[1-2][0-9]|3[0-1])(0[1-4]|[1-2][1-9]|3[1-5]|88)[0-9]{3}([0-9]{1})[0-9]{1}$

New

28311210102571

Regular Expression

Extraction