Up to date - zip code database?

Question

I use zipcode information here:

http://www.census.gov/geo/maps-data/data/gazetteer2010.html

in my mySQL database, but I noticed that it lacks several zipcodes

(e.g. 94142, San Francisco, CA)

.... Does anyone know some more up-to-date zip code data?

Answer 1

Try the data at http://www.geonames.org/

(There is a free zip code data with postal codes for many countries).

Answer 2

The United States Postal Service is a government agency that provides postal codes. Thus, the authoritative, always correct database belongs to them.

Fortunately, they provide free APIs that developers can use:

https://www.usps.com/business/web-tools-apis/welcome.htm

Answer 3

I get my zip codes and more from here . It also includes information on latitude and longitude, which makes it possible to calculate distances between points.

Answer 4

The reason the Census Bureau does not have all ZIP codes is because they contain only groups with a population (common delivery addresses) and do not contain ZIP codes for mailboxes.