by Marion63 » 14 Aug 2025, 22:56
Hi everyone,
I’m working on a project where I need to collect and process ZIP/postal codes from multiple countries, and I’m finding it trickier than expected. The formats vary so much—some countries use numbers only, others mix letters and digits, and the lengths can be anywhere from three to ten characters. On top of that, certain countries seem to update or reorganize their postal codes without much warning.
I’m trying to figure out the best approach for storing this information in a way that supports fast lookups and accurate validation. I’m torn between creating my own dataset from various official sources or finding one unified database that already has the global coverage I need. Ideally, it should also include city, region, and coordinates for mapping. I'm probably gonna need to use something like
this data provider for zip codes so if you guys wanna suggest any other option, I'll be happy to take a look at it..
Has anyone here already tackled something similar? How did you handle both the format differences and the update process?

Hi everyone,
I’m working on a project where I need to collect and process ZIP/postal codes from multiple countries, and I’m finding it trickier than expected. The formats vary so much—some countries use numbers only, others mix letters and digits, and the lengths can be anywhere from three to ten characters. On top of that, certain countries seem to update or reorganize their postal codes without much warning. ;)
I’m trying to figure out the best approach for storing this information in a way that supports fast lookups and accurate validation. I’m torn between creating my own dataset from various official sources or finding one unified database that already has the global coverage I need. Ideally, it should also include city, region, and coordinates for mapping. I'm probably gonna need to use something like [url=https://www.geopostcodes.com/]this data provider for zip codes[/url] so if you guys wanna suggest any other option, I'll be happy to take a look at it..
Has anyone here already tackled something similar? How did you handle both the format differences and the update process? :P