Assuming you are requiring the 1- and the area code:

1-[0-9]{3}-[0-9]{3}-[0-9]{4}

Something more flexible might be

((1-)?[0-9]{3}-)?[0-9]{3}-[0-9]{4}

HTH.

--Ben Doom

Che Vilnonis wrote:

> Real simple questionfolks...I use something like this to flag invalid
> zipcodes:
>
> <cfscript>
> if (NOT (REFind('^[[:digit:]]{5}(( |-)?[[:digit:]]{4})?$',FORM.ZIP) NEQ 0))
> {}
> </cfscript>
>
> What RegEx would work to validate a US phone number in a 1-888-555-1212
> format?
>
> Thank again...Che
>
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