You are looking at the entire network. Each number on the map represents the n/8 subnet under it.
Zoom on the left to see a higher or lower subnet. Change the color coding mode on the right (currently colors represent organizations in the rows below).
Click on a point or enter an IP address or hostname in the box to get information about that IP and its networks. Leave it blank to see where you are.

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This is the pure CGI version. You can also try the JavaScript version.

© 2007 Dylan Simon < dylan at dylex dot net >
Inspired entirely by xkcd. Data copyright IANA, CompleteWhois, ARIN and the other RIRs, NIRs, and LIRs.