North American Network Operators Group
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Re: Geo location to IP mapping

  • From: Charles Cala
  • Date: Tue May 16 14:00:46 2006
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--- Marshall Eubanks <[email protected]> wrote:

> 
> I seriously doubt this would work to better than the regional area.
> 
> My zip code (20124) region is about 5 km across, which would be 15  
> microseconds in vacuum, and
> maybe at most 50 micro seconds in glass. So, you would need  
> accuracies at the 10's of microsecond level to specify zip codes.

don't forget, cable paths are not direct, and each bend in 
the cable increases the distance that the light must 
travel within the fiber. optical repeaters, optical 
switches and other equipment can add distance, 
(thus time) to the signal.

Please see 
http://www.fiber-optics.info/fiber-history.htm