There is a dataset that
may be of use when dealing with US 5 character ZIP codes.
http://www.unitedstateszipcodes.org/zip-code-database/Caveats
* Latitude & longitude are coarse. 2 decimal digits.
*State is postal code not FIPS code.
*County is literal not FIPS code.
*variable ZIP. I changed mine to A5 could have use N5.
For many applications you may want to add variables with
Federal Information Processing Standard codes (FIPS codes) for County and State
from variable view.
zip String 5 0
type String 8 0
primary_city String 15 0
acceptable_cities String 138 0
unacceptable_cities String 2208 0
state String 2 0
county String 16 0
timezone String 19 0
area_codes Numeric 7 0
latitude Numeric 5 2
longitude Numeric 6 2
world_region String 2 0
country String 2 0
decommissioned Numeric 1 0
estimated_population Numeric 5 0
notes String 13 0
Art Kendall
Social Research Consultants