NSF does not use CFDA numbers to identify what division will receive your application. So, opportunities which list multiple CFDA#’s are properly distributed within NSF using the NSF Cover Page Block #2 – Division Code & Program Code. Ensuring these match your field of research when submitting will then deliver the proposal to the proper group. For an example see: Opportunity #09-598. Only one CDFA out of the 10 available can be retrieved since NSF strictly uses the Cover Page form as the true identifier.