Regular Expressions 101

^start of line

Negative Lookahead(?!417500.{10}|4026.{12}|4405.{12}|4508.{12}|4844.{12}|4913.{12}|4917.{12})

1st Alternative417500.{10}

417500the literal text 417500

.{10}any character (except for line terminators), repeated exactly 10 times

2nd Alternative4026.{12}

4026the literal text 4026

.{12}any character (except for line terminators), repeated exactly 12 times

3rd Alternative4405.{12}

4405the literal text 4405

.{12}any character (except for line terminators), repeated exactly 12 times

4th Alternative4508.{12}

4508the literal text 4508

.{12}any character (except for line terminators), repeated exactly 12 times

5th Alternative4844.{12}

4844the literal text 4844

.{12}any character (except for line terminators), repeated exactly 12 times

6th Alternative4913.{12}

4913the literal text 4913

.{12}any character (except for line terminators), repeated exactly 12 times

7th Alternative4917.{12}

4917the literal text 4917

.{12}any character (except for line terminators), repeated exactly 12 times

Positive Lookahead(?=4.{12}|4.{15})

1st Alternative4.{12}

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

.{12}any character (except for line terminators), repeated exactly 12 times

2nd Alternative4.{15}

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

.{15}any character (except for line terminators), repeated exactly 15 times

.*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

^(?!417500.{10}|4026.{12}|4405.{12}|4508.{12}|4844.{12}|4913.{12}|4917.{12})(?=4.{12}|4.{15}).*

New

4123456789452
4767656752657256
4026678267543216
4175001234567865
4278908765432
4027236512341234
4844999999999999

Extraction