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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: IPv4 country of origin
I believe Akamai offers an IP address to location database for sale. I'm unsure of the accuracy, but Akamai folks claim it to be quite high. YMMV. - Daniel Golding On Thu, 3 Oct 2002, Barry Raveendran Greene wrote: > > > > > > Is there a more accurate method to determine the country of origin for an > > IP than the methods I've described above? > > Physical geography and DNS do not match. Some of the most popular web sites > in Indian under the .in domain are physically in the US and owned by US > companies. Having a web site under the .in domain is a means to reach a > market. > > Physical geography and IP addresses do not match. Once the RIR allocates to > the LIR, the LIR can sub-allocate anywhere. So a LIR (ISP) in Singapore with > a regional business could allocate their address block to customers in > Singapore, Hong Kong, China, India, and any other place where they offer > services. > > DNS LOC Recorded might be helpful. But, as noted in one CAIDA paper ... > > "Both the whois-based and hostname-based mapping rely on the assumption that > educated guesses are required in the absence of explicit location > information. While RFC 1876 [RFC1876] did define a DNS extension to provide > a LOC resource record type that allows administrators to associate latitude > and longitude information with entries, it turns out to be sub-optimally > useful. First, the RFC specifies only the format and interpretation of the > new field, without establishing where or at what > granularity to use it. Because of this, finding the appropriate LOC resource > record may require multiple DNS queries. More importantly, people just do > not use it. NetGeo currently does not use DNS LOC queries by default because > their low success rate does not justify the expense > of the three or more DNS lookups typically needed to rule out the existence > of a valid DNS LOC record." > ---> > http://www.caida.org/outreach/papers/2000/inet_netgeo/inet_netgeo.html#dnslo > c > > > There are tools that CAIDA has worked on like NetGeo (now something sold by > Ixia) http://www.caida.org/tools/utilities/netgeo/. Might be something to > check out along with all the other Internet mapping projects. > > >
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