Thus spake <firstname.lastname@example.org>
> Say I have about 10 /16's reachable through firewalls in SJC, RDU, SYD, and
> No traceroutes or pings can make it past these firewalls, nor do the
> indicate any particular location. How exactly do you plan on mapping these
> zip code, when I can tell you those addresses are fairly randomly spread, in
> increments, to sites all over the world?
It is very easy. Anyone would care about it only when users from those
addreses interact with whatever the software that ends up creating those
databases. If those users never buy stuff from Amazon.com, Amazon.com does
not care where they are. But eh moment they do, somewhere someone is
cruniching the data that says "Of 10 sites that I saw this IP address access
and provide a clearing for the credit card transaction, 9 ended up being
within 3 miles radius of ZZZZ. Lets put a tag on that"
But Amazon already knows where I live, so why do they need an IP-to-address
database? My physical location is irrelevant for load-balancing purposes --
topological location is what matters. If they want to sell me "local" products,
they can do that by looking at the zip code on file for my shipping address.
> The neat thing about selling databases like that is nobody can ever prove
> incredibly inaccurate they are. Just come up with a reasonable-sounding
> collection methodology and claim any counterexamples are just flukes, then
> collect money from the saps who believe you...
The really neat things about talking to computer geeks is that they all
operate with the lots of absolutes. They will explain to you why in a
specific case it does not work and forget that those specific cases are
That's because we've dealt with too many business types who hype how well the
general case works but ignore the exception cases that crash or corrupt your
P.S. So, ever bought stuff from Amazon from one of those IP addresses and
sent it to some non-related location *just* to confuse the mapping
Not intentionally, but I work from a dozen different IPs, including ones from a
pool "located" in a different state that is shared by 30k VPN users worldwide.
I've also ordered stuff from IPs all over the world and shipped to various
locations inside the US. I wonder where Amazon thinks I actually live, if they