regex101: PCRE (Legacy) Match Workspace

Pro

1st Alternative^127.0.0.1

^start of line

127the literal text 127

.any character (except for line terminators)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

.any character (except for line terminators)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

.any character (except for line terminators)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2nd Alternative168\.192\.([0-9]|[1-9][0-9]|1[0-1][0-9])\.([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$

168the literal text 168

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

192the literal text 192

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

1st Alternative[0-9]

Character Class[0-9]

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

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

Character Class[1-9]

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

Character Class[0-9]

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

3rd Alternative1[0-1][0-9]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-1]

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

Character Class[0-9]

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 2([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])

1st Alternative[1-9]

Character Class[1-9]

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

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

Character Class[1-9]

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

Character Class[0-9]

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

3rd Alternative1[0-9]{2}

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-9]{2}

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

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

4th Alternative2[0-4][0-9]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-4]

0-4one character from 0 (48₁₀) to 4 (52₁₀)

Character Class[0-9]

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

5th Alternative25[0-5]

25the literal text 25

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

$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

25 tokens

Regular Expression

^127.0.0.1|168\.192\.([0-9]|[1-9][0-9]|1[0-1][0-9])\.([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$

Unit Tests

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