Beispiele:

fj5025.inktomisearch.com*Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp)

66.249.66.204*crawl-66-249-66-204.googlebot.com*Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

und so weiter ...