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Re: Lookup zip by IP address [message #171576 is a reply to message #171574] Mon, 10 January 2011 22:02 Go to previous messageGo to previous message
Captain Paralytic is currently offline  Captain Paralytic
Messages: 204
Registered: September 2010
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Senior Member
On Jan 10, 8:44 pm, "Twayne" <nob...@devnull.spamcop.net> wrote:
> Innews:c9ba34e2-15b2-43b2-b5e3-c1c73f35d6ee(at)f20g2000vbc(dot)googlegroups(dot)com,
> laredotorn...@zipmail.com <laredotorn...@zipmail.com> typed:
>
>> Hi,
>
>> Can anyone recommend any free software for (roughly)
>> looking up a zip code by IP address?  It only has to  work
>> in the continental US.  I tried this that I found through
>> Google --
>> http://www.phpclasses.org/package/2428-PHP-Get-hostname-zip-code-and-...
>> .  But it hasn't worked for me, probably because the
>> database doesn't have that many entries.
>
>> Thanks, - Dave
>
> Unless you know you can get to the user's ACTUAL IP address and not just
> that of his server, something I doubt you can do, it'll never work for you.
> Most ISPs cover larger geographic areas than just one zip. My ISP for
> instance is 120 miles south of me, in a different zip,  and it covers, at a
> quickl glance, at least 14 zips. And the ISP is as far as you're going to
> get with an IP. You need the IP of the USER, which the ISPs will not give
> out.

No you are totally wrong. You do get the IP of the user, but it will
be registered to the ISP's address.
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