Regular Expressions 101

Group 1([5-8]\d\d\d\d\d\d|[8-8]\d\d\d\d\d\d|8999999)

1st Alternative[5-8]\d\d\d\d\d\d

Character Class[5-8]

5-8one character from 5 (53₁₀) to 8 (56₁₀)

\da digit

2nd Alternative[8-8]\d\d\d\d\d\d

Character Class[8-8]

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

\da digit

3rd Alternative8999999

8999999the literal text 8999999

$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

([5-8]\d\d\d\d\d\d|[8-8]\d\d\d\d\d\d|8999999)$

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