Third-class mail inundated the Chicago post office when businesses sent advertisements in unprecedented numbers, using ZIP codes for the first time to reach local customers.

The House passed two bills Monday night that would authorize the United States Postal Service to create 76 new ZIP codes for communities around the country. These two bipartisan bills, led by Rep ...

Lake Charles, LA (KPLC) - The Louisiana District of the United States Postal Service announced Monday that most mail delivery and retail operations in the 700, 701, 703, and 704 3-Digit ZIP Code areas ...

ZIP codes will remain fixed to specific geographic locations; the post office has no plans to allow Americans to take their ZIP codes with them, wherever they go. Read Seabrook's Story: ...