Regular Expressions 101

^start of line

0?optionally matches the literal 0 (48₁₀ / 60₈ / 30₁₆)

7the literal 7 (55₁₀ / 67₈ / 37₁₆)

Character Class[4-9]{1}

{1}matches one character from the set below:

4-9one character from 4 (52₁₀) to 9 (57₁₀)

Character Class[0-9]{8}

{8}matches exactly 8 characters from the set below:

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

$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

^0?7[4-9]{1}[0-9]{8}$

New

07901611249
7901611249
7812304777
7812345678
7901123456
07901234567