US ZIP codes are a type of postal code used within the United States to help the United States Postal Service (USPS) route mail more efficiently. Some still refer ... www.unitedstateszipcodes.org |
ZIP codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. The term ZIP, an acronym for Zone Improvement Plan, ... en.wikipedia.org |
A detailed database of all US Zip Codes, City Information and Area Codes. www.findazip.com |