Zip + 4 latitude/longitude database

I have a zip+4 database system that gives me latitude/longitude for a zip+4, but it is $3,000 a year.  Does anyone know of a zip+4 latitude/longitude database that costs less?  (I already have 5-digit zip data, I need Zip+4)
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JohnBPriceAsked:
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lherrouConnect With a Mentor Commented:
Well, I suspected it might be, because there aren't a lot of providers who do the regular updates needed for an accurate geocoded zip+4 database. I only know of one other, and, at least in the past, they were more expensive.
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lherrouCommented:
JohnBPrice,

GeoData is $2K for full dataset, but they don't reveal subscription pricing:
http://www.melissadata.com/geocoder/geodata.htm

The problem with Zip+4, as you probably know, is that the +4 part changes a lot, and is not 100% tied to a geographical (physical) location. So, most datasets do not include this information.

Cheers,
LHerrou
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JohnBPriceAuthor Commented:
Thanks lherrou, my $3K subscription is the MelissaData GeoCoder.
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JohnBPriceAuthor Commented:
OK, maybe I'm going down the wrong path with Zip+4.  What I need is more accurate address locations than 5-digit zips alone can give.  It is a store locator service we provide to our customers.  So maybe I should pursue other mapping solutions.  Geocoder.us provides free/more inexpensive address locations.  Google does it too, but Google is only free for free-public websites, and some of our clients don't use our store locator on their website though we use it internally for customers who call customer service (we do customer service on behalf of our clients).  Google wants $10K for commercial use.
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lherrouCommented:
Have you looking into Mapquest? A lot can be done within the framework of their free developers edition and related APIs.
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JohnBPriceAuthor Commented:
Yes I did, I can code addresses with MapQuest, it's pretty fast and seems at least as accurate if not more than zip+4.  Your answer put me on to it, so you get the "A" (like I ever give anything else...).
Thanks,
see you in the lounge...
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