I've been using the zipcode information from here:
in my mySQL database but I've noticed that it's missing quite a few zipcodes
(ex. 94142, San Francisco, CA)
....does anyone know of some more up to date zip code data?
24 Answers
Try the data at
(There's a Free postal Code Data link there, with postal codes for lots of countries).
3The United States Postal Service is the government entity that provisions ZIP codes. As such, the authoritative, always-correct database is theirs.
Happily, they provide free APIs that developers can use:
1The reason why the Census Bureau doesn't have all ZIP Codes is because they only contain the ones with populations (general delivery addresses) and don't contain ZIPs for PO Boxes.
I get mine zip codes, and more, from here. This also includes latitude and longitude information, which makes calculating distances between locations possible.
