That bot is from whois.sc Go to http://www.whois.sc/sprinttotal.com for example, it will show you the details about that URL. Very usefull... It also has a very nice meta tag... <meta name="jedi-mind-trick" content="You will bookmark this site and use it a lot.">
Useful for .com, .biz .us websites but does not cater for .UK, .fr, .de, .it etc nor does it respect robots.txt ---------------------------- Private English Lessons in London English Language Links & Resources
survey bots ramdonly access sites to estimate network performance. I remember I read somewhere. I saw the bot a few times a month