SSN Regex for 123-45-6789 OR XXX-XX-XXXX

Question

Can someone provide me a regex for SSN that matches either

123-45-6789

OR

XXX-XX-XXXX

I currently have ^\\d{3}-?\\d{2}-?\\d{4}$

Answer 1

Then it can be

/^[\dX]{3}-?[\dX]{2}-?[\dX]{4}$/

if you want x to be valid too, you can add the i modifier to the end:

/^[\dX]{3}-?[\dX]{2}-?[\dX]{4}$/i

On second thought, the regex above will accept

123-xx-xxxx

as well, so depending on whether you want this form to be accepted or not, you can use your original form "or" the other form:

/^(\d{3}-?\d{2}-?\d{4})|(xxx-xx-xxxx)$/i