[LINK] RFI: Geolocation based on IP-Address

[Roger Clarke]

At 18:16 -0500 26/9/07, Kim Davies wrote:
>Quoting Roger Clarke on Thursday September 27, 2007:
>|
>| 4.240.244.220.in-addr.arpa      name = 220-244-240-4-act-pppoe.tpgi.com.au.
>| So they rely on parsing the DNS entry for odd strings like 'act'?
>
>I think the possibly unspoken assumption here is that they are parsing
>for this _automatically_, which is probably wrong. Ranges are likely are
>computed using rules that have been devised after humans have studied
>and individually classified the naming systems and routing arrangements
>employed by each network provider.

There are presumably thousands of ISPs that operate in multiple areas 
- many scores in Australia alone I would imagine.  (Unfortunately 
Kim's Australian ISP List is no more: 
http://www.cynosure.com.au/isp/).

Manual analysis sounds very expensive.  Is the company making *that* 
much money?

-- 
Roger Clarke                  http://www.anu.edu.au/people/Roger.Clarke/

Xamax Consultancy Pty Ltd      78 Sidaway St, Chapman ACT 2611 AUSTRALIA
                    Tel: +61 2 6288 1472, and 6288 6916
mailto:Roger.Clarke at xamax.com.au                http://www.xamax.com.au/

Visiting Professor in Info Science & Eng  Australian National University
Visiting Professor in the eCommerce Program      University of Hong Kong
Visiting Professor in the Cyberspace Law & Policy Centre      Uni of NSW