I believe the following two options need to be added/included for Zip code measures in the group builder: Between, or From To . In the set As it is, after the recent system update, if we have a list of specific zip codes that do not all begin with the same numbers (the Portland area, for example, is comprised of 970... 971... and 972... but then broken down into different areas, so the current options are not sufficient).
This functionality is already possible by using the "Begins with any of these" measure, and using '97'.