Hi,
The minimum and maximum post code fields allow you to enter ranges of post codes.
For example, for Lyon, France, you can use the minimum 69000 and the maximum 69009 and the shipping method will then be available only for the people with an address in that city with the post codes 69000, 69001, 69002, ... or 69009
If you have non contiguous ranges, you can potentially create several shipping methods.
Alternatively, this shipping plugin allows for entering a list of zip codes:
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