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Ask HN: Where can I get list of valid US zip codes for free?

2 points by rgovind ↗ HN
Hello,

Where can I get list of valid US zip codes for free? I found this list but I do not think it is accurate.

https://gist.github.com/dryan/7486408

For example, 34001 and 04857 are listed a valid in the above link but USPS says they are invalid zip codes. If I do not find a ready made list, I will have to use USPS api and check each zip code individually.

1 comment

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LarryMade2
You might try some of the mass mailing utility vendors, zip code accuracy are key to getting good mail rates.

Edit: IIRC you can get a db and updates through USPS, its a subscription thing if you dig around you can find it.