Bing operates three crawlers today:
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bingbot
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adidxbot
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msnbot
Bingbot is our standard crawler and handles most of our crawling needs each day. Adidxbot is our adCenter crawler responsible for crawling ads and following through to websites from those ads for quality control. MSNbot was our old crawler before bingbot arrived on the scene. MSNbot handles some multimedia crawling duties for us currently, though will retire soon. Bingbot will take over all MSNbot duties at that time.
Bing does not share IP addresses for our crawlers.
To control how our crawlers interact with your website, you have two options:
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Robots.txt files can be configured to tell our crawlers how to interact with your website
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Through Bing Webmaster tools you can control crawl rates for bingbot directly