On Thu, Sep 24, 2015 at 09:41:42PM -0400, William Herrin wrote:
On Thu, Sep 24, 2015 at 9:33 PM, Ian Clark <ian.clark@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
I assumed it must be based off of WHOIS. The IP space I'm working with is in the midwest (US). The address associated with it is from our primary IP block out here in California, which it would have only been able to gather from WHOIS. If it had gone off the last hop, presumably it would have seen that as something a little closer to the real location rather than *exactly* where our primary environment is. :) Ray