Regular expression in Javascript to validate US phone number

Question

I'm using /^\d{3}\ ?-? ?\d{3}\ ?-? ?\d{4}$/; to validate US phone numbers. Can anyone tell me how to modify this expression to make () optional on the first set of numbers.

For example: it should work for (123)234-2345 , 123-345-4567 , 123 - 345 - 4567 , 123345-6789

Olaf Dietsche · Accepted Answer · 2012-11-28 08:33:03Z

2

Area code with or without braces

(?:\(\d{3}\)|\d{3})

optional - with optional spaces around it

(?: *- *)?

3 digits

\d{3}

and 4 digits

\d{4}

and all together now

^(?:\(\d{3}\)|\d{3})(?: *- *)?\d{3}(?: *- *)?\d{4}$

edited Nov 28, 2012 at 8:33

answered Nov 28, 2012 at 8:26

Olaf Dietsche

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3 Comments

Olaf Dietsche Over a year ago

@melpomene Thanks for this hint, fixed.

Olaf Dietsche Over a year ago

@melpomene Ouch, embarrassing :$

Olaf Dietsche Over a year ago

@melpomene I hope, I'm old enough to stick with it ;-)

melpomene · Accepted Answer · 2012-11-28 08:22:11Z

0

/^\(?\d{3}\)? ?-? ?\d{3} ?-? ?\d{4}$/

answered Nov 28, 2012 at 8:22

melpomene

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4 Comments

Swati Awasthi Over a year ago

after your second d{3} '\' is missing

melpomene Over a year ago

No, there is no \ missing. Why are you asking me about your expression instead of trying my answer?

Swati Awasthi Over a year ago

Because mine and yours is same except the '\'

melpomene Over a year ago

No, it isn't. Mine doesn't contain ^(?.

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