Hi Jim Have you tried posting the form data to the http://zip4.usps.com/zip4/zip4_responseA.jsp page? see the post command in the docs. That's how I would do it. -Chipp Jim Hurley wrote: > This is something that is new to me and I have no understanding of the > options. > > I have considered using Run Rev to get the 4 additional numbers in zip > codes.