Msnbot was a web-crawling robot (type of internet bot), deployed by Microsoft to collect documents from the web to build a searchable index for the MSN Search engine.
The month of October 2010 saw the official retirement of msnbot from most active web crawling duties and its replacement by bingbot.
[1] As of September 2015, msnbot was still active from the Microsoft and the Bing webmaster help & howto documentation still indicated that msnbot was active (but that it would retire soon).
[2] The verification tool for bingbot[3] previously did not recognise msnbot IP addresses.
This World Wide Web–related article is a stub.