Regular Expressions 101

^start of line

Group 1((192\.168\.1|201.110\.2(0[8-9]|1\d|2[0-3]))\.([1-9]\d?|1\d\d|2[0-3]\d|24\d|25[0-4]))

Group 2(192\.168\.1|201.110\.2(0[8-9]|1\d|2[0-3]))

1st Alternative192\.168\.1

192the literal text 192

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

168the literal text 168

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2nd Alternative201.110\.2(0[8-9]|1\d|2[0-3])

201the literal text 201

.any character (except for line terminators)

110the literal text 110

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Group 3(0[8-9]|1\d|2[0-3])

1st Alternative0[8-9]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[8-9]

8-9one character from 8 (56₁₀) to 9 (57₁₀)

2nd Alternative1\d

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\da digit

3rd Alternative2[0-3]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-3]

0-3one character from 0 (48₁₀) to 3 (51₁₀)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 4([1-9]\d?|1\d\d|2[0-3]\d|24\d|25[0-4])

1st Alternative[1-9]\d?

Character Class[1-9]

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

\d?optionally matches a digit

2nd Alternative1\d\d

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\da digit

3rd Alternative2[0-3]\d

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-3]

0-3one character from 0 (48₁₀) to 3 (51₁₀)

\da digit

4th Alternative24\d

24the literal text 24

\da digit

5th Alternative25[0-4]

25the literal text 25

Character Class[0-4]

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

$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

^((192\.168\.1|201.110\.2(0[8-9]|1\d|2[0-3]))\.([1-9]\d?|1\d\d|2[0-3]\d|24\d|25[0-4]))$

New

1.2.3.4
69.69.69.69

192.168.1.0
192.168.1.1
192.168.1.69
192.168.1.233
192.168.1.254
192.168.1.255

201.110.207.1
201.110.208.1
201.110.208.127
201.110.219.123
201.110.223.254
201.110.223.255

Regular Expression

Extraction