Regular Expressions 101

Group 1(\((21|11)\) 9|\((?!21|11)\d{2}\) )

1st Alternative\((21|11)\) 9

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 2(21|11)

1st Alternative21

21the literal text 21

2nd Alternative11

11the literal text 11

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

9the literal text 9

2nd Alternative\((?!21|11)\d{2}\)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negative Lookahead(?!21|11)

1st Alternative21

21the literal text 21

2nd Alternative11

11the literal text 11

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

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[6789]

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

7the literal 7 (55₁₀ / 67₈ / 37₁₆)

8the literal 8 (56₁₀ / 70₈ / 38₁₆)

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

\d{3}a digit, repeated exactly 3 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(\((21|11)\) 9|\((?!21|11)\d{2}\) )[6789]\d{3}-\d{4}

New

(21) 96000-0000
(21) 6000-0000
(10) 6000-0000
(10) 96000-0000