I just discovered a great tool for anyone who deals with the arcane world of DNS. It shows how DNS changes are propagating across the world with a neat world map view. It’s great to have a visualization tool for something so abstract. I can dig the command line for its simplicity and power but sometimes I need to “see” what the virtual world looks like.

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Theres another useful DNS propagation checker at http://viewdns.info/propagation/