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See all on WikipediaList of ZIP Code prefixes - Wikipedia
Each cell in this table contains a three-digit ZIP code prefix, the state where that ZIP code prefix is located, and the name of the United States Postal Service (USPS) Sectional Center Facility (SCF) that serves that ZIP code prefix, which may be in a different state. Each SCF may serve more than one three-digit ZIP โฆ See more
โข Originally, the surrounding offices in Puerto Rico overlapped alphabetically. 006 was assigned for A-L, and 007 was assigned for M-Z. See more
1963ZIP Codes system was introduced1992-07-01A new SCF opened at Dulles International Airport1998-07-01Brockton switched over to 023, which covers the communities east of Brockton. The west branches of Boston that were all originally under the 021 prefix, such as Lexington, Brookline, and Newton, were moved to the 024 prefix after a new SCF opened in Waltham, Massachusetts. Clearwater changed its codes from the 346 prefix back to the 337 prefix, which currently covers the entirety of the county.2002-07-01The 398 prefix was introduced by splitting the western half of the Albany SCF.2009-07-01The rural communities outside of Mesa, Arizona in the 852 prefix were switched to a new prefix, 851, due to the rapid growth of the Phoenix metropolitan area.Wikipedia text under CC-BY-SA license
