Hi pivotguy,
I have tried two things:- On "show" sheet, you have a dropdown menu and the lookup uses a wild card, meaning if you are looking for "7" for a zip code, it will return 00077 and 71254 records
- On "requirement" sheet, I added another dropdown list in C3 that is populated when the A3 list value changes: so you can't use wild cards but you have all possible entries that are proposed for any given section.
In my opinion both solutions will work nicely if you don't have too many data. If you have a few thousands lines, it could be better to use autofilter to extract results.