I suppose either way you're going to run into accuracy problems, but that
is the nature of the beast.  IP wasn't ever developed to be a geographical
thing, but we're trying to get geographical info from 'guessing'.  I guess
it boils down to one of three things;

A> Where are Wills users going to be when accessing the site?  Internal or
external?  From a hotel room or from another office?
B> Can you trust that the user will change their clocks on their machines?
C> Does Wills company go with that kind of network routing?  (I don't go to
hotels often, so I can't state whether each building has their own external
IP or if they route as you suggest)

If "A", and if they're using internal IPs, you could still get a good idea
of where the users are based on their internal IP, pending you're not
running the same network range in multiple locations.  (Network guys love a
challenge sometimes. ;))

I suppose another option would be that when a user logs into whatever
service Will is offering, then a field asking for the current local time
would get the most real accurate time.

On Fri, Aug 1, 2014 at 7:32 PM, Donald Shepherd <donald.sheph...@gmail.com>
wrote:

> Actually what Rob and I were pointing out was that the chances of showing
> up in Taiwan when you're in Tennessee is actually quite high in a corporate
> environment - he gets moved from the UK to Germany, I get moved from
> Australia to Phoenix, AZ, my wife gets moved from Australia to Switzerland
> and that's just a random sample.  It's not uncommon at all for large
> companies to route traffic through a single gateway, and as a result using
> geolocation to detect timezones is very prone to problems if people want to
> access a site from inside a large company, whereas using client-based logic
> avoids this.
>
>
> On 2 August 2014 09:27, Stephen Chrzanowski <pontia...@gmail.com> wrote:
>
> > I understand that with routing and such, you can end up outside where you
> > really are (With my IP, I'm shown just outside of Toronto when I'm
> actually
> > two hours out), but the chances of showing up in Taiwan when you're in
> > Tennessee is doubtful.  The point of the matter is that you'll get real
> > time data in regards to where the user might be located and from there,
> > you'll get a general idea on when a good time to call is.
> >
> > There are also bounce VPNs which would make it look like I'm in Texas
> when
> > I'm in Toronto.  Depending on how I route my traffic here, I can be
> > anywhere in the world.
> >
> >
> > On Fri, Aug 1, 2014 at 5:51 AM, Will Fong <w...@digitaldev.com> wrote:
> >
> > > Hi everyone,
> > >
> > > Wow, such great responses! So my background is not with this type of
> > > development, so I never really thought about these types of problems
> > > before. Thank you all for the help!
> > >
> > > -will
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