Regular Expressions 101

^start of string

Group 1(0[1-7]|1[0-356]|2[0-7]|3[0-6]|4[0-7]|5[1-7]|6[1-7]|7[0-5]|8[013-6])

1st Alternative0[1-7]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-7]

1-7one character from 1 (49₁₀) to 7 (55₁₀)

2nd Alternative1[0-356]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-356]

0-3one character from 0 (48₁₀) to 3 (51₁₀)

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

3rd Alternative2[0-7]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-7]

0-7one character from 0 (48₁₀) to 7 (55₁₀)

4th Alternative3[0-6]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[0-6]

0-6one character from 0 (48₁₀) to 6 (54₁₀)

5th Alternative4[0-7]

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

Character Class[0-7]

0-7one character from 0 (48₁₀) to 7 (55₁₀)

6th Alternative5[1-7]

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

Character Class[1-7]

1-7one character from 1 (49₁₀) to 7 (55₁₀)

7th Alternative6[1-7]

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

Character Class[1-7]

1-7one character from 1 (49₁₀) to 7 (55₁₀)

8th Alternative7[0-5]

7the literal 7 (55₁₀ / 67₈ / 37₁₆)

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

9th Alternative8[013-6]

8the literal 8 (56₁₀ / 70₈ / 38₁₆)

Character Class[013-6]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

3-6one character from 3 (51₁₀) to 6 (54₁₀)

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

$end of string

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Search reference

Regular Expression

^(0[1-7]|1[0-356]|2[0-7]|3[0-6]|4[0-7]|5[1-7]|6[1-7]|7[0-5]|8[013-6])\d{4}$

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