Regular Expressions 101

Group 1(\d+)

\d+a digit, repeated at least once

Negative Lookbehind(?<!10)

10the literal text 10

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 2(\d+)

\d+a digit, repeated at least once

Negative Lookbehind(?<!192\.168)

192the literal text 192

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

168the literal text 168

Negative Lookbehind(?<!172\.(1[0-6]|2\d|3[0-1]))

172the literal text 172

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 3(1[0-6]|2\d|3[0-1])

1st Alternative1[0-6]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-6]

0-6one character from 0 (48₁₀) to 6 (54₁₀)

2nd Alternative2\d

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

\da digit

3rd Alternative3[0-1]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[0-1]

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 4(\d+)

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 5(\d+)

\d+a digit, repeated at least once

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(\d+)(?<!10)\.(\d+)(?<!192\.168)(?<!172\.(1[0-6]|2\d|3[0-1]))\.(\d+)\.(\d+)

74.125.226.134
10.0.1.1
172.16.0.0
172.31.0.1
172.32.0.0
192.168.10.1
104.44.81.79