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The UK is a tiny island in comparison to the US but uses 1.7 Million Postcodes that pinpoint locations quite well. The US has an extension to the ZIP code that, if adopted widely, could solve the problem of codes covering too large an area.
Not being from the US, I'd like to know if people tend to know their ZIP + 4. From what I read about ZIP + 4 it appears to be mostly companies that will use them rather than the general population. It seems to me that knowing your own ZIP + 4 would be handy if local search sites supported them as it would give you more accurate geographic results (without having to type in your entire address - which admittedly would be better still for geolocation services).
Do you know yours?
Do you think the general public know theirs?
Is there something better than ZIP + 4 for a quick, accurate lookup?
I'm sure there are many reading this topic and thinking...
"What's my +4?"
There are prestigious Zip Codes by default. For example, 90210 (Beverly Hills). Add a unique +4 to that and you have another "soft branding" element. :)
Now, if you can convince the U.S.P.S. to give you your own custom +4 like above, that would be the ultimate!
Because of that hearsay, I've stopped using the zip+4 info that I get from white pages reverse-lookups to avoid getting our brochures etc labelled as junk mail -- because they're not!
You made a major business decision based on something one customer told you?
This hardly sounds like a major business decision to me, unless they're sending large amounts of bulk mail.
But no, the USPS will not "filter out" junk mail. However, I can see some customers associating the +4 with junk.
Rather than linking out to others providing this service I'd suggest that, as the source of this data is the USPS, anyone looking would probably do well to start there.