The U. S. Postal Service has provided two handy tools.
To find the Zip Code(s) for a town or city, use this:
»www.usps.com/zip4/cityto ··· _zip.htm.
If you know the complete address, this will give the full 9-digit Zip Code:
If you would like to find out any of these items associated with a Zip Code: county name, area code(s), time zone, latitude and longitude, MSA/PMSA, or FIPS code, use this:
»www.zipinfo.com/search/z ··· code.htm