IP Address Lookups and Mapping

Services exist to compute a location (lat/long) for an IP address.  This can be used for targeted advertising when you log onto a site (it gets your location before returning a page to you, and thus can tailor the ads you see), or to track the locations of people interested in your web site.

To get your IP address:

  • - - [31/Aug/2011:20:44:05 -0400] "GET /Users/oceano/pguth/microdem/win32/microdem_setup.exe HTTP/1.1" 200 81700295
  • - - [31/Aug/2011:21:15:06 -0400] "GET /Users/oceano/pguth/microdem/win32/microdem_setup.exe HTTP/1.1" 200 81700295
  • - - [31/Aug/2011:21:07:25 -0400] "GET /Users/oceano/pguth/microdem/win32/microdem_setup.exe HTTP/1.1" 200 81700295
  • - - [31/Aug/2011:21:26:46 -0400] "GET /Users/oceano/pguth/microdem/win32/microdem_setup.exe HTTP/1.1" 200 81700295
Every time a user visits a web site, the GET request is recorded in the server's log files and can be reviewed by the site administrators.  The log includes the user's IP address (, the date and time, the URL requested, the version of the HTTP protocol, the success/failure code (200 = OK), and the number of bytes returned to the client (MICRODEM_Setup required 82 MB).

These are requests to download MICRODEM (IP addresses have been randomly altered).
Download locations for MICRODEM in March 2011.  The IP addresses were extracted from the server logs, run through an IP address lookup, and then turned into a GIS database for plotting.

Directions for IP-Mapper (http://www.zonums.com/iptools/ipmapper.php) for a number of addresses:

Last revision 8/3/2021