Data source for determining postal codes given location?

Question

What is the best data source for determining international postal codes given a latitude & longitude?

Answer 1

Paid for

EZ-Locate (TeleAtlas - owned by TomTom)

http://www.geocode.com/index.cfm?module=download

NAVmart (NavTeq owned by Nokia)

http://www.navmart.com/geocoding.php

http://www.navmart.com/geocoding_services.php

Free

Via Michelin (API and better coverage in Europe rather than globally)

http://dev.viamichelin.com/

Geonames (good open-source - patchy accuracy in rural locations)

http://www.geonames.org/export/reverse-geocoding.html

Answer 2

Here another one: (10,000 calls per day free) https://simplegeo.com/docs/clients-code-libraries

Answer 3

I asked a question recently, trying to achieve the opposite (had city, country wanted lat/long). I used this free database. It won't give you postcodes (so it's not really an answer), but it does give you city and country, if that is useful.