Well this is interesting... found in v2013 the zip code was in AR_Customer but not in Sy_ZipCode. Yet when i removed the zip in Cust Maint, hit accept, then go back and enter the zip, it didn't prompt me 'is this a new zip'. If I entered a totally new bogus zip code, it did prompt me. So chalked it up to corruption in Sy_ZipCode in v2013. Did find in v2016 that even though the zips have no spaces, if they enter them into Cust Maint with a space, Sage appears to recognize it and returns the city/state.