the post office started using zip codes on july 1, 1963.
when did the post office start using zip codes?
july 1 , 1963
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Na
california outlawed this practice in 2011.





























section::::other uses.:legislative districts.





























zip codes may not currently be used to identify existing legislative districts. although the website of the u.s. house of representatives has a "find your representative" feature that looks up congressional districts based on zip codes alone, it often returns multiple districts corresponding to a single zip code. this is because different parts of one zip code can be in different districts. one proposal to eliminate the possibility of extreme partisan gerrymandering calls on using zip codes as the basic units for redistricting.





























section::::other uses.:internet.
zip code