Answer
There should be no correlation between these two sets of data.
Check Explanation for more.
Explanation
A positive correlation means the two quantities being compared both behave the same way, that is, as one quantity increases, the other one increases too and when one of them decreases, the other one decreases too.
A negative correlation means when one of the two quantities being comoared is reduced, the other quantity increases and vice versa.
No correlation means there is no relationship between the two quantities.
The number of zipcodes in a country varies from country to country depending on how many regions the postal services of that country have divided the country into.
And the number of parking meters is a function of how many blocks (how large a location is) a location has.
So, there isn't a real relationship between the number of zipcodes in a country and the number of parking meters.
So, there should be no correlation between these two sets of data.
Hope this Helps!!!