zip codes
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Are people who live in even numbered zip codes happier than people who live in odd numbered area?
Asked by elbanditoroso | 13 responses -
What are some special zip or postal codes?
Asked by RedDeerGuy1 | 22 responses -
How are zip codes in the United States arranged?
Asked by mathwhiz1 | 9 responses -
Aren't there any free SF zip code maps online?
Asked by zina | 4 responses -
When did postal zip codes begin national use?
Asked by kelly | 1 response
