Regular Expressions 101

^start of line

Non-Capturing Group(?:10|127|172\.(?:1[6-9]|2[0-9]|3[01])|192\.168)

1st Alternative10

10the literal text 10

2nd Alternative127

127the literal text 127

3rd Alternative172\.(?:1[6-9]|2[0-9]|3[01])

172the literal text 172

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:1[6-9]|2[0-9]|3[01])

1st Alternative1[6-9]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[6-9]

6-9one character from 6 (54₁₀) to 9 (57₁₀)

2nd Alternative2[0-9]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-9]

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

3rd Alternative3[01]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[01]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

4th Alternative192\.168

192the literal text 192

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

168the literal text 168

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

.*any character (except for line terminators), repeated any number of times

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

^(?:10|127|172\.(?:1[6-9]|2[0-9]|3[01])|192\.168)\..*

1.2.3.4
192.168.10.20
10.20.30.40
172.10.20.30
172.17.100.200
127.0.0.1
100.200.300.400
1.192.168.200