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GeoIP information

On Thu, Sep 24, 2015 at 9:33 PM, Ian Clark <ian.clark at dreamhost.com> wrote:
> Where do GeoIP companies get their data, if not whois records?

I would assume that they query whois for one of their sources. They
don't have to enter any contract with ARIN to do so but they also
can't promptly collect any sizable portion database that way. That
isn't the same as signing up for bulk whois access
(https://www.arin.net/resources/request/bulkwhois.html).

I imagine they also do traceroutes to identify the last known location
in the route.

Regards,
Bill Herrin

-- 
William Herrin ................ herrin at dirtside.com  bill at herrin.us
Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>