Google does not specifically understand 5 digit numbers as zip codes. You can however leverage the Google Numrange search functionality. In order to target a zip code using this method you'll simply have to include the state or city so that the search can make a connection.
Just take note that the Google Numrange search is run in sequential order. So if you were online searching for a new jacket and you wanted to be between $40 and $50 you could search
"Spring Jacket" (Philadelphia | "King of Prussia") $40..$50 See the results here
Here is a recruiting example:
19087..19111 (PA | Philadelphia) "Design Engineer" (intitle:resume | inurl:resume) -job -jobs -sample -samples -example See the results here