Bingbot

robots.txt

Respects robots.txt and the Crawl-delay directive, which lets you tune crawl frequency.

Verify authenticity

Reverse DNS + forward DNS

Reverse DNS to a *.search.msn.com host, confirmed by a forward DNS lookup. Microsoft publishes the IP list as JSON (bing.com/toolbox/bingbot.json), to refresh daily. Bing Webmaster Tools offers a dedicated verification tool.

SEO recommendation

Allow

Allow: Bing is the only other general-purpose engine with meaningful volume, and it feeds Copilot. Blocking it forgoes a traffic source and AI visibility.

Good to know

Bing acts as the index backbone for several third-party engines (DuckDuckGo, Ecosia): improving its coverage helps beyond Bing alone.