DuckDuckGo Bot
DuckDuckBot is the Web crawler for DuckDuckGo. It respects WWW::RobotRules and originates from these IP addresses:
    72.94.249.34
    72.94.249.35
    72.94.249.36
    72.94.249.37
    72.94.249.38
If you have any questions or concerns, please let us know..
Changelog
DuckDuckBot/1.1 - Bug fix: was not respecting robots.txt in some cases.
DuckDuckBot/1.0 - Initial version.