Regular Expressions 101

Explanation
Pro

1st Alternative^($\d{2,}$ ((\d{4}-\d{4})|(9\d{4}-\d{4})))

^start of string

Group 1($\d{2,}$ ((\d{4}-\d{4})|(9\d{4}-\d{4})))

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\d{2,}a digit, repeated at least 2 times

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Group 2((\d{4}-\d{4})|(9\d{4}-\d{4}))

1st Alternative(\d{4}-\d{4})

Group 3(\d{4}-\d{4})

\d{4}a digit, repeated exactly 4 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{4}a digit, repeated exactly 4 times

2nd Alternative(9\d{4}-\d{4})

Group 4(9\d{4}-\d{4})

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

\d{4}a digit, repeated exactly 4 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{4}a digit, repeated exactly 4 times

2nd Alternative(\d{2})((9\d{8})|(\d{8}))$

Group 5(\d{2})

\d{2}a digit, repeated exactly 2 times

Group 6((9\d{8})|(\d{8}))

1st Alternative(9\d{8})

Group 7(9\d{8})

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

\d{8}a digit, repeated exactly 8 times

2nd Alternative(\d{8})

Group 8(\d{8})

\d{8}a digit, repeated exactly 8 times

$end of string, or before its final line terminator

Detailed match information will be displayed here automatically.

25 tokens

^(\(\d{2,}\) ((\d{4}-\d{4})|(9\d{4}-\d{4})))|(\d{2})((9\d{8})|(\d{8}))$

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62991788276

62991788276