Quote:
Originally Posted by Quoth
Yes, I knew that. What I wondered was how do they know what is a "residential" address and I wondered did someone moving into an ex-warehouse or office (such are being repurposed in London) have problems ordering Kindle eBooks in USA.
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US Zip codes can have 3 parts
Part 1 is the Post office (most place this a single city, but not always)
Part 2 is the Carrier Route (also used to presort mass mailings to get a discount)
Part 3 is the fine level sort (eg last 2 digits of a house #) I don't see this very often
I suspect Part 2 (called +4) is enough to determine Residential vs Commercial district.