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

(^\d{3}-?\d{2}-?\d{4}$|^XXX-XX-XXXX$) should do it.

---- EDIT ----

As Joel points out you could also do ^(\d{3}-?\d{2}-?\d{4}|XXX-XX-XXXX)$ which is a little neater.