Regular Expressions 101

Explanation

Pro

^start of string

998the literal text 998

Group 1([378]{2}|(9[013-57-9]))

1st Alternative[378]{2}

Character Class[378]{2}

{2}matches exactly 2 characters from the set below:

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

7the literal 7 (55₁₀ / 67₈ / 37₁₆)

8the literal 8 (56₁₀ / 70₈ / 38₁₆)

2nd Alternative(9[013-57-9])

Group 2(9[013-57-9])

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

Character Class[013-57-9]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

3-5one character from 3 (51₁₀) to 5 (53₁₀)

7-9one character from 7 (55₁₀) to 9 (57₁₀)

\d{7}a digit, repeated exactly 7 times

$end of string, or before its final line terminator

Detailed match information will be displayed here automatically.

25 tokens

^998([378]{2}|(9[013-57-9]))\d{7}$

New

998912434445

998912434445