Regular Expressions 101

^start of line

Non-Capturing Group(?:5[1-5][0-9]{2}|222[1-9]|22[3-9][0-9]|2[3-6][0-9]{2}|27[01][0-9]|2720)

1st Alternative5[1-5][0-9]{2}

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

Character Class[1-5]

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

Character Class[0-9]{2}

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

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

2nd Alternative222[1-9]

222the literal text 222

Character Class[1-9]

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

3rd Alternative22[3-9][0-9]

22the literal text 22

Character Class[3-9]

3-9one character from 3 (51₁₀) to 9 (57₁₀)

Character Class[0-9]

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

4th Alternative2[3-6][0-9]{2}

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[3-6]

3-6one character from 3 (51₁₀) to 6 (54₁₀)

Character Class[0-9]{2}

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

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

5th Alternative27[01][0-9]

27the literal text 27

Character Class[01]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-9]

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

6th Alternative2720

2720the literal text 2720

Character Class[0-9]{12}

{12}matches exactly 12 characters from the set below:

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

$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.

Search reference

Regular Expression

^(?:5[1-5][0-9]{2}|222[1-9]|22[3-9][0-9]|2[3-6][0-9]{2}|27[01][0-9]|2720)[0-9]{12}$

Test String
New

5100000000000000
5500000000000000
2221000000000000
2720000000000000

Regular Expression

Test StringNew

ExtractionProcessing...

Test String
New

Extraction
Processing...