regex101: US and Mexico Phone Numbers with Extensions

Pro

^start of line

Non-Capturing Group(?:(52\-)|(1\-))?

?repeats the group contents below at most once:

1st Alternative(52\-)

Group 1(52\-)

52the literal text 52

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

2nd Alternative(1\-)

Group 2(1\-)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 3(\()?

?repeats the group contents below at most once:

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Condition(?(1)[0-9]{2,3}|[2-9][0-9]{2})

Uses the first branch if group 1 matched

If the condition is true, match this branch:[0-9]{2,3}

Character Class[0-9]{2,3}

{2,3}matches between 2 and 3 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Otherwise, match this branch:[2-9][0-9]{2}

Character Class[2-9]

2-9one character from 2 (50₁₀) to 9 (57₁₀)

Character Class[0-9]{2}

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Condition(?(3)\)\s?|(\-|[.]|\s|))

Uses the first branch if group 3 matched

If the condition is true, match this branch:\)\s?

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\s?optionally matches any whitespace character

Otherwise, match this branch:(\-|[.]|\s|)

Group 4(\-|[.]|\s|)

1st Alternative\-

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

2nd Alternative[.]

Character Class[.]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

3rd Alternative\s

\sany whitespace character

4th Alternative — matches an empty string

Condition(?(1)[0-9]|[2-9])

Uses the first branch if group 1 matched

If the condition is true, match this branch:[0-9]

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Otherwise, match this branch:[2-9]

Character Class[2-9]

2-9one character from 2 (50₁₀) to 9 (57₁₀)

Character Class[0-9]{2}

Condition(?(4)\4|(?:\-|[.]|\s)?)

Character Class[0-9]{4}

Group 5(\s?(?:x|ext|ext.|extension|Ext|Ext.|Extension|#)\s?[0-9]+)?

$end of line

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

25 tokens

Regular Expression

^(?:(52\-)|(1\-))?(\()?(?(1)[0-9]{2,3}|[2-9][0-9]{2})(?(3)\)\s?|(\-|[.]|\s|))(?(1)[0-9]|[2-9])[0-9]{2}(?(4)\4|(?:\-|[.]|\s)?)[0-9]{4}(\s?(?:x|ext|ext.|extension|Ext|Ext.|Extension|#)\s?[0-9]+)?$

New

Regular valid formats

225-586-7777
(223)249-4444
(223) 234-3344
223.456.2222
2253451111
223 334 4444

1-325-586-7777
1-(923)249-4444
1-(923) 234-3344
1-923.456.2222
1-9253451111
1-923 234 4444

52-125-586-7777
52-(123)249-4444
52-(123) 234-3344
52-123.456.2222
52-1253451111
52-123 134 4444

Valid formats with extensions

1-800-661-3696 x14700
1-800-661-3696x14700
1-800-661-3696 Extension 14700
1-800-661-3696 ext14700

325-586-7777 x123
(323)249-4444x123
(323) 234-3344 Ext 123
323.456.2222 ext 124
3253451111ext. 123
323 334 4444extension234
(223)456 7891 x 123
(223)456 7891 ext 123
(223)456 7891 ext. 123
(223)456 7891 Ext 123
(223)456 7891 Ext. 123
(910)456-8970 x12
(910)456-8970 #12
(910)456-8970 extension12456
(910)456-8970 Extension 12456

Invalid formats

444000-1111
444-0001111
444.000-1111
444000 1111
444 0001111
444 000.1111
444.0001111
444000.1111
444-000.1111
(4440001111
444)0001111
440001111
444000111111

125-586-7777
(123)249-4444
(123) 234-3344
123.456.2222
1253451111
123 134 4444

125-586-7777
(123)249-4444
(123) 234-3344
123.456.2222
1253451111
123 134 4444

Invalid formats with extensions

12-125-586-7777
12-(123)249-4444
12-(123) 234-3344
12-123.456.2222
12-1253451111
12-123 134 4444

12-444000-1111
12-444-0001111
12-444.000-1111
12-444000 1111
12-444 0001111
12-444 000.1111
12-444.0001111
12-444000.1111
12-444-000.1111
12-(4440001111
12-444)0001111
12-440001111
12-444000111111

1-888-720-1275 x2 x2
1-888-720-1275 2
1-888-720-1275 x
1-888-720-1275 Ext
888-720-1275x

1-444000-1111
1-444-0001111
1-444.000-1111
1-444000 1111
1-444 0001111
1-444 000.1111
1-444.0001111
1-444000.1111
1-444-000.1111
1-(4440001111
1-444)0001111
1-440001111
1-444000111111