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From: Benjamin Kaplan <benjamin.kaplan@case.edu>
Date: Sat, 13 Jul 2013 11:17:15 -0700
Subject: Re: GeoIP2 for retrieving city and region ?
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On Sat, Jul 13, 2013 at 10:43 AM, =CE=9D=CE=B9=CE=BA=CF=8C=CE=BB=CE=B1=CF=
=82 <nikos@superhost.gr> wrote:
> =CE=A3=CF=84=CE=B9=CF=82 13/7/2013 7:54 =CE=BC=CE=BC, =CE=BF/=CE=B7 Denni=
s Lee Bieber =CE=AD=CE=B3=CF=81=CE=B1=CF=88=CE=B5:
>>
>>         Are you paying for a fixed IP number? I suspect you are if you
>> were
>> running a world-accessible server.
>>
>>         Obviously a fixed IP will be tied to a fixed connection and
>> thereby to
>> a fixed location which can be provided to a location database.
>>
>>         But most of us have DHCP assigned IP numbers, which change
>> everytime we
>> reboot our connection (or even when the DHCP lease expires -- which may =
be
>> daily).
>
>
> Same networking scheme for me too, dynamic that is.
>
> Every time the DHCP lease expires or i reboot the router i get a new ip
> address but every time the link i provided states accurately that my ip
> address is from Thessalon=C3=ADki and not Europe/Athens which is were my =
ISP
> location is.
>
> Not to mention that in facebook, no matter the way i'am joining, via
> smartphone, tablet, laptop it always pinpoints my exact location.
>
> But yes, i can understand your skepticism.
> An ip address can move anywhere while remaining connected to the same ISP=
,
> just like a networking device in the house, remains connected to the same
> router while changing rooms or even floors, or even buildings.
>
> But then how do you explain the fact that
> http://www.maxmind.com/en/geoip_demo
> pinpointed Thessalon=C3=ADki and not Athens and for 2 friends of mine tha=
t use
> the same ISP as me but live in different cities also accurately identifie=
d
> their locations too?
>

It's not telling you where your ISP is headquartered. It's telling you
where the servers that you're connecting to are. In your case, you're
connecting to servers that your Athens-based ISP has in a Thessaloniki
datacenter. The only way to get an accurate location is to use
something other than IP- phones like to use a combination of their
GPS, a map of the cell phone towers, and a map of wi-fi hotspots (this
is one of the things that Google's StreetView cars log as they drive).