Regular Expressions 101

\ban ASCII word boundary

Negative Lookahead(?!.{0,7}[DFIOQU])

.{0,7}any character (except for line terminators), repeated between 0 and 7 times

Character Class[DFIOQU]

Dthe literal D (68₁₀ / 104₈ / 44₁₆) (case sensitive)

Fthe literal F (70₁₀ / 106₈ / 46₁₆) (case sensitive)

Ithe literal I (73₁₀ / 111₈ / 49₁₆) (case sensitive)

Othe literal O (79₁₀ / 117₈ / 4F₁₆) (case sensitive)

Qthe literal Q (81₁₀ / 121₈ / 51₁₆) (case sensitive)

Uthe literal U (85₁₀ / 125₈ / 55₁₆) (case sensitive)

Character Class[A-VXY]

A-Vone character from A (65₁₀) to V (86₁₀) (case sensitive)

Xthe literal X (88₁₀ / 130₈ / 58₁₆) (case sensitive)

Ythe literal Y (89₁₀ / 131₈ / 59₁₆) (case sensitive)

\da digit

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Negated Character Class[^-\w\d]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\wany word character

\da digit

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\da digit

\ban ASCII word boundary

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

\b(?!.{0,7}[DFIOQU])[A-VXY]\d[A-Z][^-\w\d]\d[A-Z]\d\b

New

Valid
123 4th Street, Toronto, Ontario, M1A 1A1
12456 Pine Way, Montreal, Quebec H9Z 9Z9
Invalid
123 4th Street, Toronto, Ontario, Q1A 1A1
12456 Pine Way, Montreal, Quebec H9Z-9Z9
56 Winding Way, Thunder Bay, Ontario, D56 4A3
34 Cliff Drive, Bishop's Falls, Newfoundland B7E 4T
123 4th Street, Toronto, Ontario, M1A 1Q1

Regular Expression

Substitution